The functioning of enhancers is an example of .

A) post-translational control that activates certain proteins
B) the stimulation of translation by initiation factors
C) a post-transcriptional mechanism to regulate mRNA
D) transcriptional control of gene expression
E) a eukaryotic equivalent of prokaryotic promoter functioning

D) transcriptional control of gene expression.

Explanation:

Enhancers as the name indicates are required to enhance transcription of a gene. Enhancers are nothing but a small stretch of DNA which may be located either in upstream (mainly) or downstream region of a particular gene.  If they are distantly located from a gene then in order to cause increased transcription of that gene they form a loop to reach near the promoter region of the gene. With the help of activators and transcription factors they can enhance the expression of gene at transcriptional level.

a

explanation: