17.

Answer and Explanation

Your Answer is

Correct Answer is C

Explanation

To amass the staggering number of corks needed to construct the boat is the purpose adverbial of the sentence, 165,231 in all is the parenthesis, and the subject of the sentence is Pollack. Item C uses double dashes to separate parentheses for emphasis.

Item A: There can be no comma after staff.

Item B: Treat 165,231 as parentheses.

Item D: in all modifies the number, so there cannot be a comma in front of in.