Which of the following is true about the action of sulforaphane?

a. HDAC activity is inhibited for a short amount of time
b. Acetylation is reduced with changes in enzyme activity, with results in decreased gene expression
c. HDAC activity increases for a short amount of time
d. Acetylation is promoted with changes in enzyme activity, which results in increased gene expression
e. HAT activity increases for a short amount of time
f. HAT activity is inhibited for a short amount of time