Answer:
C. the product of
Explanation:
A. "shared equally among" indicates division (ex. 16 apples are shared equally among 4 people ⇒ 16÷4)
B. "increased by" indicates addition (ex. the number of apples, 16, increased by 2 ⇒ 16+2)
C. "the product of" indicates multiplication (ex. the product of 5 and 6 ⇒ 5×6)
D. "the quotient of" indicates division (ex. the quotient of 40 and 10 ⇒ 40÷10)
I hope this helps!