Ambo Inc. earned $200,000 for the current year. This means: Select one: a. Ambo's retained earnings must be $200,000 more at December 31 than it was at January 1 b. Ambo's earnings increased Ambo's net assets $200,000 during the year. c. Ambo's cash increased $200,000 during the year. d. Ambo's total assets increased $200,000 during the year.