I'll mark

the state transportation department wants to find out how citizens of the state would feel about increasing fees on the state's toll roads. which surveying technique is most likely to give an unbiased report of the citizen's opinions?

a. survey a random selection of drivers passing through the state's highway toll booths
b. survey a random selection of truck drivers who use the states toll roads
c. survey a random selection from a list of the states citizens
d. survey a random selection of members of the states transportation department