Plzz
which sentence contains an adverb clause?
a.
when you return from california, take a taxicab from the airport.
b.
california has three of the top ten most populated cities in the united states.
c.
yosemite national park, in central california, covers nearly 1,200 miles of mountainous terrain.
d.
the state of california is also called the golden state.

What is implied in this sentence from mark twain's "the £1,000,000 bank-note"? i was puzzled, and wanted to discuss the matter a little further, but they didn't; so i took my leave, feeling hurt and insulted to be made the butt of what was apparently some kind of a practical joke, and yet obliged to put up with it, not being in circumstances to resent affronts from rich and strong folk.