Solve the Problem $48 \mathrm { ft } ^ { 2 }$

Multiple Choice

Solve the problem.
-A packing crate measures 4 feet by 12 feet by 7 feet. What is the area of its smallest side?

A) $48 \mathrm { ft } ^ { 2 }$
B) $28 \mathrm { ft } ^ { 2 }$
C) $84 \mathrm { ft } ^ { 2 }$
D) $336 \mathrm { ft } ^ { 3 }$