Mario is working on his math homework and is asked to use the distributive property to rewrite the expression 6d - 3e + 9f. His answer is 3(d - e + 3f). Which best describes Mario's error, and what is the correct answer?
A.)Mario can use the distributive property, but he didn't properly factor the first term in the parentheses. His answer should be 3(25 - e + 3f).
B.) Mario cannot use the distributive property to rewrite this expression because 6, 3, and 9 do not have a common factor.
C.)Mario cannot use the distributive property, since one of the terms is subtracted. You only can use the distributive property for adding numbers.
D.)Mario's answer is correct.