Police officers can determine that your motor skills are too impaired for you to drive safely if: a. you can't read an eye chart b. you can't repeat the alphabet backwards c. you can't walk in a straight line

C. You can't walk in a straight line.

Explanation:

Police officers can identify the individuals who are either in influence of drug or alcohol. They strictly stop such people during their ride and impose huge penalty on them. Among the options given, You can't walk in a straight line is the correct option. As individuals with unstable body balance cannot drive the vehicle appropriately. Hence, chances of accident by them are prominent.

i believe it is 40–40–20%

explanation:

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.