Grimblegrot Words

In which set (A, B or C) can all the words be made from "grimblegrot"?

A B C
orbit
trigger
rioter
grease
logger
tumble
oblige
tremor
timber
toggle
gerbil
goblet
mobile
bleed
boiler
bolter
grouse
gorge

All the words in set
can be made from "grimblegrot".