Answer:
I believe there are three factors that lead to success, pursuing your passion, working hard, never giving up, remaining positive, and collaborating well with others.
P.S. You put 5 factors that lead to success but I'll leave it the way it is.
One should always learn from one's pasy mistakes and avoid them in the future.
Explanation:
Pretty sure it's C. while that's what i'd go with, it could be B.
Well I'll suggest soccer marathon basketball cricket and others..
D
gets goes with a plural noun, but Older people is singular
