Answer:
To search for sources in the library's catalog search page, you should begin with a/an _______ search.
B. author
Explanation:
The search should be concentrated on Louis Pasteur, who is the author of the germ theory of diseases. Therefore, the search for sources of information should be concentrated on the author. As the search goes on more information will surely be discovered about Louis Pasteur, his discoveries about germs, and more importantly, his conclusions on the germ theory of diseases.
If it's just a random thesis:
Topic: Dog Fights
Thesis: Dog fights should be illegal, since they are a cruel way to abuse dogs for profit.
Opposing Thesis: Dog fights are entartaining, and should be continued.
His madness is portrayed through illusion and abstract
