College Board ? of the Day

Choose the word or set of words that, when inserted in the sentence, best fits the meaning of the sentence as a whole.

Although the scientist claimed to have made a major breakthrough in his research, the evidence he offered as proof of his assertion was ------- at best.

A) conclusive
B) indubitable
C) paltry
D) copious
E) extensive

Hint: The word although cast doubt on the scientist's claim.