An unusually high amount of rainfall lowered the
salinity of a saltwater lake. Many brine shrimp died,
but some survived and reproduced.
Which statement best explains what happened to
the brine shrimp population?
A Natural selection caused the brine shrimp in
the lake to go extinct.
B The allele to tolerate low salinity became less
common in the gene pool following the
rainfall.
C The shrimp with the highest fitness survived
to pass their genes on to the next genration.