Fibroblast Cells That Uptake Cloned MyoD DNA

Fibroblast cells that uptake cloned MyoD DNA

A) do not contain DNA with muscle-cell-specific enhancer sequences.
B) produce myosin and bHLH protein, but do not produce protein E.
C) probably produce protein E and therefore will not differentiate into muscle cells.
D) produce protein I, myosin, and myogenic bHLH protein.
E) produce protein E, myosin, and myogenic bHLH protein.