In this item, we are asked to identify which among the given choices is a property that is being shown by the equation,
(mn)⁵ = m⁵n⁵
It can be observed that m and n are multiplied to each other, inside the parentheses for the expression written on the left side of the equation. Also in the right hand side of the equation, 5 which is the power, is distributed to the elements m and n.
The property that is being depicted in this number is the power of a product property. Thus, the answer to this item is letter B.