A monopolist will continue expanding output as long as MR>MC, but what about economic profit>0?

CFA Level I Economics
#1

Hi guys,
Here is the question:
A monopolist will continue expanding output as long as:
A) MR>MC
B) Economic profit> 0
C) MR>0

I do get that answer A is correct. But to me, answer B should be correct too. Can someone elaborate on the relationship between Economic profit and willingness to expand output?
Regards.

#2

A monopolist will likely want to maximize economic profit, not merely generate positive economic profit.