Biblioteca
Estuda os sinais, revê a matéria e consulta resumos quando precisares.
#c79be8165dda
The motorcyclist is going to change lanes in a very congested area. A 'glance' over the shoulder can help him, because:

AMirrors may not catch the blind spot.Correct
BThis way he avoids signaling his presence.
CThis way other drivers will yield to him.
Does the correction look wrong?Let us know and we'll review this question.