The Plant Arabidopsis Is Widely Used to Understand Plant Function

The plant Arabidopsis is widely used to understand plant function. There are many reasons for its successful use EXCEPT

A) the Arabidopsis genome has been fully sequenced.
B) Arabidopsis has a rapid generation time from embryo to seed.
C) the plant is readily transformed using multiple techniques.
D) the whorls of Arabidopsis form double flowers which enable identification of the flower parts.
E) mutations in specific genes are relatively easy to produce and identify.