B, because that is in its chromosomes and dna, the others they get or figure out how to do it
Well, the food is in the environment. I would like to compare it with how bacteriae feed (however my biology is quite rusty), that is, they engulf their food and they "digest" -- not the proper term, since there are no organs to do real digestion -- it.
Idk if It depends on the cell but the process is called Asexual reproduction, it basicly means that the cells don't need another partner to make more of them it just kinda forms onto there body till it just falls off