How is the form of who or whom used in this sentence?

who on earth would dress up as the statue of liberty?

a. possessive

b. direct object

c. subject

d. object of preposition

d) the narrator even suggested that the white whale, moby d, was ubiquitous and present in every ocean at every moment.  

a-he encouraged islamic schools to introduce greek texts.

d-he invited greek scholars to teach their texts to the locals.

explanation:

the transmission of the greek classics to latin western europe during the middle ages was a key factor in the development of intellectual life in western europe.[1] interest in greek texts and their availability was scarce in the latin west during the earlier middle ages, but as traffic to the east increased so did western scholarship.

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