1. 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.

answer: i would say he was very determined and persistent in overcoming obstacles.

explanation:   "the magician of menlo park" as he was called, liked to tell an incident that happened when he was 8 years old and came back home crying after attending school for three months because his teacher called him "sterile and unproductive". from nowadays perspective, we can say that thomas alva edison was one of the most persistent and determined man that has ever existed. when edison was 14, he contracted scarlet fever. the effect of the fever, as well as a blow to the head by an angry train conductor, caused edison to become completely deaf in his left ear, and 80-percent deaf in the other. so as you can see he had to struggle to not so many minor issues but he always succeeded.

answer; ///(a)//the death of his