Here Is the ABC Hypothesis of the Impact of Genes

Multiple Choice

Here is the ABC hypothesis of the impact of genes A,B,and C on floral part development:
i."A" genes are switched on in the two outer whorls (sepals and petals) .
ii."B" genes are switched on in the two middle whorls (petals and stamens) .
iii."C" genes are switched on in the inner two whorls (stamens and carpels) .
Which of these genes are active for petals?

A) i
B) i and ii
C) i and iii
D) iii and iv