The effects of alcohol...

A)They reduce the field of vision.Correct
B)They reduce the reaction distance.
C)They increase the reaction capacity.
Alcohol produces a reduction of the visual field, with stimuli on the sides not being perceived, called the tunnel effect (we only see the centre of the road clearly). This effect also occurs with speed.
As for the reaction distance, it will increase, while our reaction capacity will decrease.
As for the reaction distance, it will increase, while our reaction capacity will decrease.