That is a display of the distributive property.
This is shown because when a number is written directly next to a set of parentheses, you must multiply each value inside the parentheses by the number on the outside.
In this case, 5(8-6) means that you must multiply 5 by 8, as well as by -6.
The right side of the equal sign in the given problem shows both of those steps separately, which is why it is a display of the distributive property. The correct answer is A.
