Use the Graph of a Quadratic Function to Find the Solution

Multiple Choice

Use the graph of a quadratic function to find the solution set of the equation or inequality.
- $x^{2}-13 x+40 \leq 0$

A) $\{5,8\}$
B) $(-\infty, 5) \cup(8, \infty)$
C) $(5,8)$
D) $[5,8]$