(A)
a prospective pool buyer
to inspect three pools the builder has constructed, make sure that the builder does not have exclusive distribution deals with a single supplier, and
have investigated(B)
a prospective pool buyer
to inspect three pools the builder has constructed,
to make sure that the builder does not have exclusive distribution deals with a single supplier, and investigate
(C) that a prospective pool buyer
should inspect three pools the builder has constructed,
to make sure that the builder does not have exclusive distribution deals with a single supplier, and investigate
(D) that a prospective pool buyer
have inspected three pools the builder has constructed, made sure that the builder does not have exclusive distribution deals with a single supplier, and investigate
(E)
that a prospective pool buyer
inspect three pools the builder has constructed, make sure that the builder does not have exclusive distribution deals with a single supplier, and
investigateThe correct answer is E.
recommend(bossy verb) + THAT + subject + command subjunctive
Other such bossy verbs -
demand, dictate, insist, mandate, propose, request, stipulate, suggest