On April 30, 20X1, P Corporation, on a calendar year, purchases all the stock of S Corporation, which files its tax return on a June 30 year-end. If P elects to file a consolidated tax return with S, what tax year must be used by the new affiliated group?

A. Both P and S must change to April 30 year-end

B. Neither corporation needs to change its year-end

C. P must change to a June 30 year-end

D. S must change to a calendar year.