A summer occupation in maize-growing regions is detasseling the maize: removing unwanted male flowers so that female flowers on the same plant are pollinated by the desired pollen for the hybrid maize. Which of the following best describes maize plant flowers?

A) They have both stamens and carpels and the plant is dioecious.
B) They have both stamens and carpels and the plant is monoecious.
C) They have either stamens or carpels and the plant is dioecious.
D) They have either stamens or carpels and the plant is monoecious.