Find the complete factorization of the expression.

−21xyz − 28xy − 35yz
A) 7y(3xz + 4x + 5z)
B) −7y(3xz + 4x + 5z)
C) −7(3xyz + 4xy + 5yz)
D) −y(21xz + 28x + 35z)

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