In a certain plant,when individuals with blue flowers are crossed with individuals with blue flowers,only blue flowers are produced.Plants with red flowers crossed with plants with red flowers sometimes produce only red flowers,although other times they produce either red or blue flowers.When plants with red flowers are crossed with plants with blue flowers,sometimes only red flowers are produced; other times either red or blue flowers are produced.Which of the following is true?
A) Red is dominant B) Blue is dominant C) Red is recessive D) Red is codominant E) Red is incompletely dominant