In which sentence does the underlined adverb clause modify an adverb?

when the double eagle ii landed in paris, other balloonists who had planned to cross the atlantic cancelled their trip.

three men crossed the atlantic ocean in the double eagle ii in 1978.

some balloonists who had tried to cross the atlantic ocean disappeared before they were able to land.

the double eagle ii was a hot-air balloon that flew farther than other hot-air balloons.

In which sentence does the underlined adverb clause modify an adverb?

1. When the Double Eagle II landed in Paris, other balloonists who had planned to cross the Atlantic cancelled their trip.

2. Three men crossed the Atlantic Ocean in the Double Eagle II in 1978.

3. Some balloonists who had tried to cross the Atlantic Ocean disappeared before they were able to land.

4. The Double Eagle II was a hot-air balloon that flew farther than other hot-air balloons.

The adverb it modifies is "farther".  

All of the other sentences have clauses that modify verbs, not adverbs.

the tale tale heart is about honor and integrity. wright about the difference in honor and integrity between both of the main characters trust me there is a lot to write

have a nice day love

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serve the people! ,” smoothly translated by julia lovell, offers an initial sample of yan lianke’s writing to an english-speaking audience. a bluntly drawn, mildly erotic fable, it teases mao zedong by poking fun at a true believer who obeys the chairman’s precepts too literally. to a western sensibility, the broad strokes of yan lianke’s humor would seem to pose little risk of inciting rebellion, whether of the flesh or of the body politic. but then, part of the book’s attraction is that it doesn’t have a western sensibility. it lets the reader see — or rather, intuit — what jokes chinese officials don’t consider funny, and how very little it takes for a writer to be branded an incendiary in 21st-century china, more than three decades after the death of mao, a decade after the death of deng xiaoping and seven years since china entered the world trade organization, a move that would seem to signal a willingness (however wary) to mingle with the rest of the world.