D) it has to depend on the type of crypt
The process is called Peer-Reviewing. In Peer-Reviewing, scientists/academic peers "peer review" the work of a scientist to check for accuracy or any false information that might reduce the legitimacy of their study or change "how realistic/real" their study is.
p.s. This is also common sense because scientists make up an entire scientific community who base their scientific studies on consistency and accuracy.
Answer - What is the purpose of the activity ? Is there an article or picture you can snap a overview of what the details of the work is about ?
Reasoning - Little Details
D is correct the population will increase