I didn't get up earlier as usual last Sunday. In the morning having finished my homework, I do some washing．Then I telephoned one of my classmates and invited them to see a film．But unfortunately, when we got to the cinema, we founded all the tickets had sold out．We had to go back to school or play football．After that, we were about to go to home when we saw our English teacher, Mr. Li, coming towards us．Tom and I asked him some questions about what to learn English well．He told us we had made great progresses in English．He also suggested that we read more and write more．We promised him that we would follow our advice．

股民甲和乙分别持有同一家公司的股票。如果乙将自己的10000股转给甲，则此时甲持有该股票的份额是乙的3倍；如果甲将自己的1000股转给乙，则此时乙持有该股票的份额比甲多6倍。那么，甲乙二人共持有（）股该公司股票。

A.6400

B.17600

C.17800

D.28800