Unsatisfied ________ with the payment，he took the job just to get some work experience.

A．though was he

B．though he was

C．he was though

D．was he though

对于指令XCHG BX，[BP-t-SI)，如果指令执行前，(BX)=6F30H，(BP)=0200H (SI)=0046H，(SS)=ZF00H，(2F246H)=415H，则执行指令后(BX)=______，(2F246H)=______。