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.
What separates humans from animals is how advanced the human minds compared to any other species
D. Past It fits the sentence best, because you don't go through the school and the supermarket to get somewhere, you got past it.
Legendary or a traditional hero