Ok so I'm confused. I was in between answer choice B and D when I was taking this exam. I ultimately chose D because I thought the answer choice was accounting for the possibility that by the gene being changing something else that the 'something else" may cause the change in regard to the Ultra vision. JY doesn't really address this possibility. Please explain.

I'm nervous just reading these post. Is it true that the FEB exam is the most intimidating ?

I started studying in June of 2016, right after graduating college in May. I plan to take the exam in June or September 2017, I haven't decided yet. I figured giving myself a year would be a sufficient amount of time. Good luck !