smart and patriotic
B.
careless and headstrong
C.
funny and easygoing
D.
nervous and untrustworthy
Chemically combined
Answer:
A compound
Explanation:
A compound is a substance made up of two or more components that are chemically combined together.
The substances that combines to form a compound is called elements.
The properties of compounds are distinct and different from the elements that combines to make them.
A wide array of compounds are known and they arise from different arrangements of atoms of elements.