In which sentence does the adverb clause modify an adverb?

a) the amazon river has been said to be longer than the nile river.

b) although denmark is located on a peninsula, the country also includes more than 400 islands.

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

B

Explanation:

In this sentence the adverb clause is: Although Denmark is located on a peninsula.

The subject of the sentences is country.

The verb is includes.

The adverb is also.

More  than 400 islands is a prepositional phrase.

Adverb clauses can modify verbs, but they can also modify adverbs and adjectives, so it is always a good idea to identify the parts of speech of the sentence before deciding which one is modified by the adverb clause.

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