Answer:
B
Step-by-step explanation:
It's not A as that is not a reason for accepting a piece of scientific knowledge. Rather, acceptance is based on the amount of evidence supporting it as well as the validity of the evidence.
It's not C as being resistant to change would make it more difficult for a piece of scientific knowledge to be accepted.
It's not D as being more complex doesn't mean being more correct.
So, it must be B.