Choice "B" is correct. Total contribution revenue is $75,000. The $50,000 unrestricted pledge is reported as contribution revenue on the statement of activities, even though it is to be paid (and collected) in the following year. The $25,000 cash gift is reported as contribution revenue on the statement of activities, even though it is restricted (it is recorded as restricted revenue). The "notice" from a recent graduate that the college is named as a beneficiary is not definite enough for the recording of revenue (the recent graduate may live a long time and may change his or her will at any time). Total contribution revenue is thus $75,000.
Choice "a" is incorrect. The $50,000 unrestricted pledge is reported as contribution revenue on the statement of activities, not just the $25,000 cash gift.
Choice "c" is incorrect. The $25,000 restricted gift is an element of recognized contribution revenue on the statement of activities, but the $10,000 "notice" is not.
Choice "d" is incorrect. The $10,000 "notice" is not reported as contribution revenue on the statement of activities, although the other two amounts related to actual receipts or receivables are recognized.