Driving a motor vehicle often requires reaction time.
a. standard
b. simple
c. complex
d. visual

Answer

Standard

Explanation
Driving a motor vehicle, requires a standard training. It is a course that requires a lot training and experience. 
Driving a motor vehicles require concentration. Careless driving leads to pamanent injuries and in other cases death. 
For this reason Driving a motor vehicle often requires standard reaction time. 

You get 6 for mechanical

Inner peace.. jk it's  a stable electron configuration