How does natural selection work with regards to genes and what is passed to the next generation?

a
Those with the least favorable combination of genes survive and pass their DNA to the next generation.
b
Those with the most favorable combination of genes die off not allowing their DNA to be passed on to the next generation.
c
Natural selection allows genes to mutate, therefore changing the species.
d
Those with the most favorable combination of genes survive and pass their DNA to the next generation.

Astudent completed a lab report. which correctly describes the difference between the “question” and “hypothesis” sections of her report? “question” states what she is asking, and “hypothesis” states the result of her experiment. “question” states what she is asking, and “hypothesis” states what she thinks the answer to that question is in “if . . then . . because” format. “question” describes what she is trying to find out, and "hypothesis" states the procedures and methods of data collection. “question” describes what she is trying to find out, and “hypothesis” states any additional information or prior knowledge about the question.