An Aquatic Plant Produces One Type of Leaf Above Water

An aquatic plant produces one type of leaf above water and another type of leaf under water.This is most likely an example of:

A) one gene having multiple effects.
B) interaction of the genotype with the environment.
C) one allele not completely masking another allele.
D) one gene masking the effect of another gene.
E) several different genes interacting.