The correct option is D was
The given sentence is in the past tense. Moreover, the adverb 'yesterday' states that the action 'o be inaugurated' has already completed in the past. Hence the sentence is in simple past tense, as it refers to a past action which has completed.
'Has been' is in the present perfect tense, hence it must be changed.
Option D: 'Was' is in the simple past tense form. It agrees to the given sentence, which is in the same tense. Hence D is correct.
Option A: 'Is' is a simple present tense verb, whereas the sentence is in the past.
Option B: 'Will be' refers to a future action, but the sentence refers to a past action (yesterday).
Option C: 'Had been' is a past perfect tense verb. This form is used to refer to a past action, which took place before another past action. But, in the given sentence, only one action is stated.
Hence options A, B and C are incorrect.