Sentence Correction (SC) | According to one expert, the cause of genetic irregularities in many b

According to one expert,the cause of genetic irregularities in many breeds of dog is not so much that dogs are being bred for looks or to meet other narrow criteria as that the breeds have relatively few founding members.

(A) the cause of genetic irregularities in many breeds of dog isnot so much that dogs are being bred for looks or to meet other narrow criteria

(B) the cause of genetic irregularities in many breeds of dog isnot as much their being bred for looks or meeting other narrow