Option D is correct. Option A and E are not correct as plural verb "have" is used. In option B, usage of tense is wrong. With the phrase "As of this morning" past tense doesn't go well. In option "yet" is redundant. Hence it is option D.
Please refer to the below excerpt from
MGMAT SC=====================================================
There are, however, 5 indefinite pronouns that can be either singular or plural depending on the context
of the sentence. You can remember these 5 by the acronym SANAM.
THE SANAM PRONOUNS: Some, Any, None, All, More/Most
How can you tell if these pronouns are singular or plural? Think about meaning, and look at the Of
phrase which usually follows the pronoun. You may recall that you are generally supposed to ignore O f
prepositional phrases (since they are misleading middlemen). But with the SANAM pronouns, the noun
object of the Of -phrase can help you determine the number of the subject.
Right: Some of the money WAS stolen from my wallet. (money is singular)
Right: Some of the documents WERE stolen from the bank, {documents is plural)
Don’t apply the Of phrase mechanically. None 0f and any of followed by a plural noun can be singular.
Right: Any of these women IS a suitable candidate for marriage to my son.
You are referring to just one woman at a time. Since the usage of these pronouns is hotly contested
among experts, the GMAT is unlikely to test controversial cases.
Note that "not one" is always singular: Not one of my friends IS here this weekend.
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