What sentence does the underlined noun clause function as the object of a preparation

Frankenstein: what attitudes toward education are expressed by shelley in her description of victor’s upbringing in chapter 1? what, for example, motivates victor and elizabeth to study/practice?

Which of these sentences exhibits proper usage? a. many doctors affiliated with university hospital expressed concern about the policy (moore 5). b. many doctors affiliated with university hospital expressed concern about the policy (moore 5). c. many doctors affiliated with university hospital expressed concern about the policy (moore 5). d. many doctors affiliated with university hospital expressed concern about the policy (moore 5).

Grammar: sequence of verp tenses quiz active the is used for an event that has been completed before the present moment in time. simple past past perfect perfect progressive past perfect progressive