Factor Completely Using the Grouping Method to Factor Trinomials $$12 x ^ { 2 } + 25 x t + 12 t ^ { 2 }$$

Factor completely using the grouping method to factor trinomials. If unfactorable, indicate that the polynomial is prime.
- $$12 x ^ { 2 } + 25 x t + 12 t ^ { 2 }$$

A) prime
B) $( 12 x + 4 t ) ( x + 3 t )$
C) $( 3 x - 4 t ) ( 4 x - 3 t )$
D) $( 3 x + 4 t ) ( 4 x + 3 t )$