All of the alleles of a specific gene in a population make up the
a. gene pool
b. mutation potential
c. dominant factor
d. chromosomes for that population

Option A, Gene pool

Explanation:

Let us define all the given options –  

Option A, gene pool – This represents the entire set of possible allele around a loci and thus can be referred to as pool of genetic information (Gene pool), Thus option A is correct

Option B, Mutation potential represents the mutation caused by certain change in regular genetic information, thus option B is incorrect

Option C, Dominant factor – It is the allele which is expressed most of the time and thus option C is incorrect

Option D, chromosomes for that population may not consists of all the alleles for a given gene, thus option D is also incorrect.

i think it is true in my reasonment ..