The other sense of "repository" is at answer C, a sense that famous American essayist Ralph Waldo Emerson used when he wrote "the air I breathe is drawn from the great repositories of nature. . ." in his essay called "History." "Repository" has been part of the English language since the 1400s, deriving from Latin "reponere," "to replace." A later related verb, "reposit," means "to deposit" or "to store." "Reposit" and "repository" are also related to "repose," which before the mid-1700s also meant "to deposit" and now means "to place confidence or trust in someone." This "repose" is unrelated to the "repose" meaning "rest."