In which sentence does the adverb clause modify an adverb?

Madagascar, where 90% of the known species of lemur live, is the world’s fourth largest island.

The Amazon River has been said to be longer than the Nile River.

Although Denmark is located on a peninsula, the country also includes more than 400 islands.

Question

In which sentence does the adverb clause modify an adverb?

Madagascar, where 90% of the known species of lemur live, is the world’s fourth largest island.

	The Amazon River has been said to be longer than the Nile River.

	Although Denmark is located on a peninsula, the country also includes more than 400 islands.

anonymous · Answer

@wwhitlock

wwhitlock · Answer

Ack, got to think about this. just a moment please.

wwhitlock · Answer

The Amazon River has been said 

 to be longer adverbial clause modifying has been said
than the Nile River. adverbial clause modiying to be longer