Consider the following information regarding the performance of a money manager in a

recent month. The table presents the actual return of each sector of the manager's portfolio in

column $(1),$ the fraction of the portfolio allocated to each sector in column $(2),$ the benchmark

or neutral sector allocations in column $(3),$ and the returns of sector indexes in column $(4).$

What was the contribution of asset allocation to relative performance?

a$)-0\mathrm{.}13\%$

b$)-0\mathrm{.}1\%$

c$)0\mathrm{.}1\%$

d$)0\mathrm{.}13\%$

Explain why D is correct, I dont understand