Are the examples AA, Ab, BB, CC, Cc genotypes or phenotypes?

Genotypes are effectively codes to help sort out the various possible allele pairs of genes. In contrast, a phenotype is a physical trait that can be observed.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.