A-source $$V_s(t) = V \cos 100 \pi t$$ has an internal impedance of $$(4 + j3) Ω$$. If a purely resistive load is connected to this source has to extract the maximum powerout of the source, its value in Ohms should be

A

3 Ohms

B

5 Ohms

C

4 Ohms

D

7 Ohms