Choose the correct simplification of (5x2y3z4)(6x3y4z2).

30x5y7z6
30x6y12z8
11x5y7z6
11x6y12z8

Multiply the numerical coefficients of both terms and add the exponents of the variables: x, y, and z to answer the problem above. The simplification is shown below. 

                      (5x²y³z^4) x (6x³)(y^4)z² = 30(x^5)(y^7)(z^6)

Thus, the answer is the first choice.