The rainbow was a bridge upon which the gods used to come to earth.
Which, if any, is the BEST way to improve the sentence The rainbow was a bridge upon which the gods used to come to earth?
A
Leave as is
B)
The rainbow was a bridge which the gods used to come to earth.
C)
The rainbow was a bridge which the gods used to come to earth upon
D
The rainbow was a bridge, upon which the gods used to come to earth.
Juju