Use the Definition of Exponent and the Addition Law of Exponents

Use the definition of exponent and the addition law of exponents to multiply the algebraic expression. $$x ^ { 3 } t ^ { 3 } x ^ { 2 }$$

A) $2 x ^ { 3 } t ^ { 5 }$
B) $x ^ { 6 } t ^ { 2 }$
C) $x ^ { 6 } t ^ { 3 }$
D) $2 x ^ { 5 } t ^ { 3 }$
E) $x ^ { 5 } t ^ { 3 }$