Fill in the Blank with One of the Words or Phrases

Multiple Choice

Fill in the blank with one of the words or phrases listed below. $$\begin{array} { l l l l } \text { general term } & \text { common difference } & \text { finite sequence } & \text { common ratio } \\\text { Pascal's triangle } & \text { infinite sequence } & \text { factorial of } \mathbf { n } & \text { series } \\\text { geometric sequence } & \text { arithmetic sequence } & &\end{array}$$
-The --------, written n!, is the product of the first n consecutive natural numbers.

A) factorial of n
B) arithmetic sequence
C) infinite sequence
D) series