Frank spends $75 on 10 magazines and 25 newspapers. The magazines cost $5 each and the newspapers cost $2.50 each. Suppose that his MU from the final magazine is 10 utils while his MU from the final newspaper is also 10 utils. According to the utility-maximizing rule, Frank should:

a. Reallocate spending from magazines to newspapers.

b. Reallocate spending from newspapers to magazines.

c. Be satisfied because he is already maximizing his total utility.

d. None of the above.