The question is actually related to the grammar of the sentence. Here, there will be no change in the sentence. So, option A is the correct answer.
Here, we have to tell whether the phrase in caps locks i.e., HAVE YIELDED is correct grammar. The type of sentence construction here is that of the perfect tense. The perfect tense is a grammatical combination of sentences used in the present tense and past tense. The implications are for actions that were done in the past but their result is present in the present as well.
In this question, the used phrase is correct as it implies that it happened earlier (past tense) but failed (present-day implications). So, there will be no changes and henceforth, option A is the correct answer.
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