I might not be 100% correct but to the best of my understanding,
Q) in the lift formula, lowering the trailing edge flaps increases......
A) S
B) Cl
C) Cl & S
D) V
I think the answer for this question would be
C) Cl & S.
Reason: Cl increases when Flaps are extended, and Wing area (S) increases as Flaps are extended... Hope this helps!
Here is a link:
http://www.experimentalaircraft.info...ft-formula.php