Collect Like Terms and Then Arrange in Descending Order $7 x^{4}+2 x^{6}+2 x^{5}+8 x^{4}+6 x^{5}+8 x^{6}$

Multiple Choice

Collect like terms and then arrange in descending order.
- $7 x^{4}+2 x^{6}+2 x^{5}+8 x^{4}+6 x^{5}+8 x^{6}$

A) $10 x^{12}+8 x^{10}+15 x^{8}$
B) $10 x^{6}+8 x^{5}+15 x^{4}$
C) $33 x^{30}$
D) $-3 x^{6}-3 x^{5}-3 x^{4}$