Epigenetic Effects-Stable Alterations to Gene Expression That Are Not Caused

Epigenetic effects-stable alterations to gene expression that are not caused by changes in the DNA base sequence-are frequently associated with changes in chromatin structure. The epigenome is the genomewide pattern of epigenetic changes possessed by an individual organism.
-Which is not a mechanism of pigenetic change?

A) DNA methylation
B) Alteration of a DNA base sequence in a promoter
C) Histone actylation
D) Nucleosome repositioning