下列前缀可以表示“再一次，重新”的是（）

A.Maintenance in Progress.
B.No passing
C.Do not block.
D.No admittance.

A. Do not touch.
B.Non-smokers Only.
C.No weapons.
D.Cleaning in Progress.

A.Work in progress.
B.Do not enter.
C.Staff Only.
D.Keep Out.