To narrow down the results for the research question "What is the life span of a pet salamander?", the search that would best work is:
A. pet AND salamander
Explanation:
1. Using "pet AND salamander" as a search term will help focus the search results on web pages or resources that contain both keywords "pet" and "salamander".
2. By combining the words with "AND," the search engine will look for pages that mention both terms together, which is crucial in finding information specifically about the life span of pet salamanders.
3. This search strategy will eliminate results that only mention one of the words, ensuring that the information retrieved is directly related to the query.
Therefore, option A is the most suitable choice for narrowing down the search results effectively to find information on the life span of a pet salamander.
