An action in a sentence can be represented in two ways, namely active and passive voice.
The passive voice always uses the past participle form of the main verb irrespective of any tense. Only the auxiliary verbs depend upon the sentence given in active voice.
The given sentence is in the active voice.
The correct answer is C) I think Tom should have been offered the job (by them).
Option C) is correct as the subject of the given sentence(they) comes in the place of the object and vice versa. Also, the main verb (offer) is used in the third form (been offered).
Options A, B, and D are not correct as the given sentence is not in the past tense, present perfect tense, and present perfect continuous tense respectively.