No where is there a choice.
For you not to have a choice, it would have to be coded on your gene. They clearly said that it is not.
epi- in this instance mean "after." Epi-genetic usually means variation happens after the formation of the gene material. They currently theorize it happens in the womb, but if they are wrong ...
We predict where the epi-marks occur, we just need other studies to look at it empirically. This can be tested and proven within six months. It's easy to test. If it's a bad idea, we can throw it away in short order.
They can come back and say, nope its not genetically encoded in the womb.
So we now know for certain that its not genetic, and if further tests determine its not encoded while in the womb, what's left? Environmental factors, thats all thats left.
The epigenome is important because it is a primary location of gene-environment interactions; it can be altered by exposure to certain environmental stimuli. Environmental effects may be direct or indirect. For example:
An environmental agent, such as a chemical toxin, may enter the cells of a tissue and interface directly with the genetic material.
Alternatively, an environmental condition, such as chronic stress, may stimulate the body to produce its own intrinsic epigenetic factors.
These environmental modifications leave the DNA sequence unchanged, but interfere with the expression of that sequence (the transcription and translation processes). Scientists are still investigating the way that the epigenome affects gene regulation. However, we know that epigenetic factors may act on DNA, RNA, and proteins at any stage of the gene-to-protein pathway: