I asked her ______.

A．how long she had the bike

B．how long did she have the bike

C．how long she bought the bike

D．how long did she buy the bike

某建筑公司与甲企业签订一份建筑承包合同，合同金额6000万元(含相关费用50万元)。施工期间，该建筑公司又将其中价值800万元的安装工程转包给乙企业，并签订转包合同。该建筑公司此项业务应缴纳印花税( )。

A．1.785万元
B．1.8万元
C．2.025万元
D．2.04万元