On a divided highway, you must unless directed to do otherwise by a sign, traffic control device, or police officer.
a. not keep right of the medianb. keep left of the medianc. keep to the center of the mediand. keep right of the median

d. keep right of the median

Explanation:

             A divided highway is type of roadways where there are two lanes in oppositely approaching vehicles and is separated by a concrete platform or strip of grass in order to separate the vehicles moving in opposite directions. This strip of concrete or grass in the middle of the highway to separate the traffic is called the medians.

            In such highways, until and unless there is a sign or a traffic control device, a driving driving a vehicle always should drive right of the median.

Hence the correct option is (d).

answer; (d) anthropology;