单项选择题

Because of his outstanding achievement in sale this year, he has been assured of a new that by his boss.

A.他今年因销售了一套新楼层而工作出色。
B.由于他今年销售作得好, 所以被允许住进新房。
C.由于他今年出色的成就, 他有了一套新住宅。
D.由于他今年的销售工作出色, 老板奖励他一套新房。