the answer is Canada,Mexico, and the U.S.
His difficulty can best be attributed to his lack of the depth cue known as "retinal disparity".
Retinal disparity is characterized as the manner in which that your left eye and your right eye see somewhat extraordinary pictures. The two marginally extraordinary pictures created in the two eyes are mixed into one view when the two eyes are open, and this is one of the manners by which human profundity observation is conceivable.
Retinal disparity is vital in checking how far away questions are. The more contrast (or more noteworthy uniqueness) between the picture each eye has of a similar question, the closer it is to you. The more distant away a protest is, then again, the more comparative it looks from review it with each eye alone.
The correct answer is False.
Explanation
Doping is considered to be the series of prohibited methods and substances that are used fraudulently in sports to improve the performance of athletes or provide external assistance to their bodies, for example, in cycling EPO is a substance that is considered as doping because it makes cyclist have more resistance and oxygen capacity. In the Olympic rules, the use of these methods or substances is considered cheating or deception because it threatens equal competition among athletes. So, the correct answer is False, The Olympic rules consider doping as a cheating.