Luv's Bio question on Evolution

[luv8724]

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Whay type of selection is most likely to lead to speciation

1. Directional selection
2. disruptive selection
3. sexual selection
4. stabilizing selection

a) 1 and 2
b) 2 only
c) 2 and 3
d) 4 only
e) 3 and 4

I put A as an answer but I feel like 3 should also be right because by female choice, new species with stronger and better traits will become dominant over the others right? and finally become new population with extreme traits..

What do you guys think..

 

[Maygyver]

I would say disruptive. You end up with two pretty different phenotypes with the heterozygote not being selected for.