For each of the partial diploids, determine whether expression of the lac operon will be inducible (wild type) or low expression in the absence of glucose (mutant). Then use this information to identify the mutations in mutant strain 3 and mutation strain 4. Select the two correct answers.

a. F' cap+ / crp+ cap- shows low expression in the lactose only condition. Mutation 4 is a CAP-cAMP binding site mutation.
b. F' cap+ / crp+ cap- shows high expression in the lactose only condition. Mutation 3 is a CAP-cAMP binding site mutation.
c. F' cap+ / crp- cap+ shows high expression in the lactose only condition. Mutation 3 is a mutation in the crp gene that produces CAP.
d. F' cap+ / crp- cap+ shows low expression in the lactose only condition. Mutation 4 is a mutation in the crp gene that produces CAP.