Which of the following statements best describes gene regulation in multicellular eukaryotes? .
a.Expression of all genes is controlled by a single transcription factor that binds to different enhancers.
b.Each gene contains a single enhancer bound by a transcription factor that controls only that gene.
c.Each gene may contain several enhancer elements each with binding sites for several different transcription factors.
d. Each cell type expresses only a single activator protein that binds to specific enhancers.
