We hope you took this opportunity to pick answer B. The Latin adjective "opportunus" was used to mean "fit, suitable, or convenient." It was formed from the prefix "op-, ob-," meaning "at or toward," and "portus," meaning "port or harbor." The Romans considered something "at the port" to be suitable and ready for use. The French took the word as "opportun" with the same basic meaning, and the word came into English as "opportune" in the 1400s. Nowadays it is often applied to a suitable or favorable time for something or to something that occurs or is done at just the right time.