When Studying Arabidopsis a Researcher Isolates a Gene Mutation That $\degree$

When studying Arabidopsis a researcher isolates a gene mutation that produces a shorter stem-height phenotype.Interestingly,when this gene is present wild-type plantand the seedling is germinated at the lower temperature of 12 $\degree$ C,the same short-stem phenotype is replicated.This phenomenon is known as

A) epistasis
B) anticipation
C) phenocopy
D) genomic imprinting
E) continuous characteristics