It's c. I mean they put it in the question. But that could be a trick lol. But I'm pretty sure
Answer:
This seems to be more of an opinionated question, but I'll help out.
Good advice is advice anybody can apply to their own issues in life. (you should insert your own example of good advice though, not sure about that one)
What exactly are you trying to figure out?
A= 7,11
B=2,3,7
C=2,2,2,5
Because 7x11 =77 when both are prime numbers
2x3x7=42 when all 3 are prime
And 2x2x2x5=40 when all 4 numbers are prime
