PART A: Which of the following expresses the main idea of the poem?

A
T-cells are the body’s most important defense against danger.
B
Imagining defensive soldiers in the bloodstream can help the body heal.
C
It’s difficult for humans to comprehend how their body works.
D
T-cells act as defensive soldiers to protect the body from harm.

Igive brainliest based on the passage about louis pasteur, which statement is a fact? louis pasteur should have studied his laboratory animals more closely. louis pasteur was clever when he decided to inject nerve tissue from sick animals into healthy animals. louis pasteur knew it took about a month for signs of rabies to show up in a victim. louis pasteur was one of the greatest scientists who ever lived.