Use the Graph to Solve the Problem $48 \mathrm {~cm} ^ { 2 }$

Multiple Choice

Use the graph to solve the problem.
-The graph shows the relationship between the area A of a rectangle and the length L, if the width is fixed. Find the area if the length is 4 cm.

A) $48 \mathrm {~cm} ^ { 2 }$
B) $0 \mathrm {~cm} ^ { 2 }$
C) $72 \mathrm {~cm} ^ { 2 }$
D) $12 \mathrm {~cm} ^ { 2 }$