In Drosophila,the MADS Box-Containing Gene,Mef2,is Expressed in Muscle Precursor Cells

Multiple Choice

In Drosophila,the MADS box-containing gene,Mef2,is expressed in muscle precursor cells.In Mef2 mutants,these cells fail to develop into muscle fibers,and instead undergo apoptosis.Based on this information,and what you know about MADS box-containing genes,Mef2 plays a role in

A) determination of muscle precursors.
B) differentiation of muscle cells.
C) the initiation of apoptosis.
D) morphogenesis.