easy · Enhanced ACT english
A paragraph describes the training of search-and-rescue dogs. The writer wants to introduce the paragraph by highlighting their extraordinary sense of smell.
Which choice best accomplishes this?
- Search-and-rescue dogs are usually large breeds, such as Labradors, because their muscular build gives them the strength to work.
- Dogs have worked alongside human beings in countless roles for at least fifteen thousand years of shared history.
- With noses that are thousands of times more sensitive than a human's, these dogs can track a scent through miles of forest.
- Every dog used in a rescue mission must first pass a series of extremely difficult tests before it can earn certification.
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