Which of the following is correct?

A

$$(6x + y)(x - 6y) = 6x^2 + 35xy - 6y^2$$

B

$$(6x + y)(x - 6y) = 6x^2 - 35xy - 6y^2$$

C

$$(6x + y)(x - 6y) = 6x^2 - 37xy - 6y^2$$

D

$$(6x + y)(x - 6y) = 6x^2 + 37xy - 6y^2$$