Common lit article “Going, Going, Gone”

Which letter salutation is correctly punctuated? A. Dear Madam: B. Dear Sir. C. Dear Publisher-- -->D. To whom it may concern; I think its D but not sure that's why i'm asking

Based on the evidence provided, readers can conclude that Rina isunconcerned.
studious.
ambitious.
disorganized​

Choose the sentence that contains an error in verb usage.A)
Most watercolorists begin with a blank canvas.
B)
Then they will sketch their design using a pencil.
C)
To fly like a bird has long been a dream of humanity.
D)
The original pencil lines will be disappeared under all those layers.

Rewrite the Paragraphs correcting any mistakes you might find in conjunctions and punctuation in compound sentences --->>1) I love to listen to jazz music,but my sister only likes pop music. We had to come up with a solution. For we both share the same bedroom. We decided to switch music every day: it's working out great!

2)The Mustang is America's symbol of the Wild West. These horses once roamed free; yet today there are few remaining. People are trying to save the mustangs that are left. And we should do what we can to help.

Correct grammar for the following:What can be done about pollution? I know what I must do(and will do--to help reduce pollution. Although, the way I see it, there are at least three things we all should do; (1) recycle everything;from cans to your old couch, (2) walk instead of drive whenever possible, and (3) pick up litter wherever you see it. Many people recycle (a practice started almost thirty years ago--but often they don't go far enough. Commonly recycled items include: newspapers, plastic, glass, and cans. Yet much more can be recycled, such as: old clothing, furniture, appliances, and tires. Many places, including retro shops, will buy that old clothing from you. You can make a good bit of money: furthermore, the world becomes a cleaner place. Instead of always driving to the store that's just a mile away, get on your bike or walk(the air and your lungs will thank you for it. When you're out walking, make it a habit to take a little bag with you. Picking up the litter that others have left behind beautifies the environment--moreover, you'll be setting a good example. It's not so hard to reduce pollution--however, we must all do our part.

Which sentence is a statement of fact?A) This is the most attentive and hard-working biology class I've had the pleasure of teaching during my thirty years here.
B) I think the dissenters can rest assured that the adoption of the curriculum has been a beneficial change for all of North Valley.
C) Half of the group members hold clipboards, and the rest carry a wide array of equipment, including nets, magnifying glasses, and vials.
D) The school board's proposed curriculum may be unconventional, but it is also more inventive and pragmatic than many of the obsolete courses the school offers annually.