My usual disclaimer applies here: this is an unofficial question, so it's inevitably imperfect (at the very least, "phenomenon" should be plural!), and I'd caution against overanalyzing it. Spoiler alert: the same is true of the questions that I write.
In this case, the parallelism and subject-verb agreement lead us to eliminate everything besides (B) and (D), as daagh and others have explained.
But what's wrong with
...
In this case, the parallelism and subject-verb agreement lead us to eliminate everything besides (B) and (D), as daagh and others have explained.
But what's wrong with
...


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