Arancher wants to investigate the use of artificial selection in his cattle herd. which of these options is an example of artificial selection?

a) breed a cow that produces large quantities of milk with a bull that comes from a line of cattle with long lifespans.

b) trace the family tree of a chicken that lays many eggs back through several generations.

c) separate a population of rabbits and monitor any trait changes over the next few generations.

d) choose one individual in a population of sheep to favor with food and shelter and see if it mates more.