Choose the One Alternative That Best Completes the Statement or Answers

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
Write a mathematical expression for the quantity described verbally.
-The area of a rectangle whose length is 15 more than its width $x$

A) $( x + 15 ) ( x )$
B) $2 x + 15$
C) $( x ) ( x - 15 )$
D) $2 \left( x ^ { 2 } + 15 x \right)$