One of the steps rob used to solve an equation is shown below.

-5(3x + 7) = 10

-15x + -35 = 10

a: rob added -5 and 3x to eliminate the parentheses. this procedure is justified by the associative property.

b: rob added -5 and 3x to eliminate the parentheses. this procedure is justified by the distributive property.

c: rob multiplied 3x and 7 by -5 to eliminate the parentheses. this procedure is justified by the associative property.

d: rob multiplied 3x and 7 by -5 to eliminate the parentheses. this procedure is justified by the distributive property.

Anyone know? will mark brainliest if correct

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