Tipping is neither encouraged nor common, although visitors may reward special services if they wish, _________ 10% of the bill is enough.

A which      B where       C in which        D in which case

Tipping is neither encouraged nor common, although visitors may reward special services if they wish, _________ 10% of the bill is enough

1. A.
   which
2. B.
   where
3. C.
   in which
4. D.
   in which case

Tipping is neither encouraged nor common, although visitors may reward special services if they wish, _________ 10% of the bill is enough.

A which      B where       C in which        D in which case

Tipping is neither encouraged nor common, although visitors may reward special services if they wish. _____, 10% of the bill is enough.

A．But               B．Altogether               C．Anyhow                 D．Indeed

Tipping is neither encouraged nor common, although visitors may reward special services if they wish, _________ 10% of the bill is enough.
A which      B where       C in which       D in which case