Express in Simplified Form the Total Surface Area of the Rectangular

Multiple Choice

Express in simplified form the total surface area of the rectangular solid given below, where a = 2 and b = 8.

A) $4 x ^ { 2 } + 48 x$
B) $5 x ^ { 2 } + 51 x$
C) $2 x ^ { 2 } + 24 x$
D) $4 x ^ { 2 } + 51 x$
E) $5 x ^ { 2 } + 48 x$