Methylation and RNA interference are both involved in regulating mobile genetic elements.Which of the following statements is TRUE?

A) Methylation is a form of post-transcriptional silencing, whereas RNA interference is a form of pre-transcriptional silencing.
B) Both are examples of post-transcriptional silencing.
C) Both are examples of pre-transcriptional silencing.
D) RNA interference is a form of post-transcriptional silencing, whereas methylation is a form of pre-transcriptional silencing.