I have watched that movie twice与I had watched that movie twi

I have watched that movie twice与I had watched that movie twice的区别
上述两句话有什么区别？还有，下面这道题为什么不能选A?如果没有上文是不是AB都可以选？
we all went to the cinema except you last night.why didn't you come?
because i______that movie twice.
A.have watched B.hadwatched C.was watching D.would watch