Given a population that contains genetic variation, what is the ...

[hummingbird]

Given a population that contains genetic variation, what is the correct sequence of the following events, under the influence of natural selection?
1.   Well-adapted individuals leave more offspring than do poorly adapted individuals.
2.    A change occurs in the environment.
3.    Genetic frequencies within the population change.
4.    Poorly adapted individuals have decreased survivorship.
A) 2 → 4 → 1 → 3
B) 4 → 2 → 1 → 3
C) 4 → 1 → 2 → 3
D) 4 → 2 → 3 → 1
E) 2 → 4 → 3 → 1

[Celeste]

A