Nope you're right :P
Tifa's mothers death is the whole surrounding of her childhood flashback. If you'd have said all of the above, you'd have been wrong, because they are all the same flashback.


32000Q:

Going by ATK % AND ATK rates who has the most powerful Ultimate Weapon in this list: 50/50, Phone A Friend, Ask The Audience.

A: Vincent Valentine
B: Yuffie Kisaragi
C: Red XIII
D: Tifa Lockheart