Find the Degree of the Polynomial $15 x^{8} y z-7 x^{6} y^{2}+x^{5} yz^{3}$

Find the degree of the polynomial.
- $15 x^{8} y z-7 x^{6} y^{2}+x^{5} yz^{3}$

A) 8
B) 10
C) 5
D) 6