So the mystery of my missing cash was solved . My brother took it , assuming it was his , even though it was on / near the checks made out to me . He did nt give it back but he gave me a equivalent amount of new cash . Today I got so much stuff in the mail . My custom frames from frames by mail for my Kurt prints .

pick from the following. - Because he gave the writer an equivalent amount of new cash .. - None of the above choices .. - Because he did n't give it back .. - Because they thought it was theirs ..
Q: What 's a possible reason the writer 's brother took the missing cash ?
Because they thought it was theirs .