PLEASE help and explain why

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim

Has anyone taken the genetics unit test in connexus? not looking for answers, just a little bit what to expect and some with studying.

Scientific evidence is most likely to be consistent if it is based on data from