Directions: The following sentences or parts thereof may have an error of grammar or syntax. Select the sentence(s)/part(s) thereof having the error.

(A) He insisted at contesting the election, though he was sure of his defeat. (B) This is the same incident that I have witnessed yesterday. (C) Prudence requires that we should meet the dangers that threaten us, (D) by turning all our philosophy, science, and art, into practical common sense.