Probable future sacrifices of economic benefits arising from past transactions or events are

A) liabilities
B) revenues
C) assets
D) retained earnings

Probable Future Sacrifices

The expected relinquishment of assets as a result of obligations.

Liabilities

Economic obligations or debts owed by a business to others, typically arising in the course of its operations.

Economic Benefits

Benefits that can be quantified in monetary terms and usually include profits, revenues, and savings.