Which of the Following Explains Why Introducing the MyoD Protein

Multiple Choice

Which of the following explains why introducing the MyoD protein into a fat cell causes that cell to become a muscle cell but adding it to a neuron will have no effect?

A) Fat cells are undifferentiated, the MyoD protein causes them to differentiate.
B) Neurons are a differentiation step after muscle cells, they cannot go "backwards."
C) Muscle-specific gene expression requires a protein that neurons do not make.
D) MyoD is causes positive feedback of MyoD expression in fats cells but not neurons.