Answer:
the answer I believe would be A
Step-by-step explanation:
paragraph 3 shows that Gertrude Belle Elion was unable to obtain a graduate research position because she was a woman, she took a series of jobs, including lab assistant, chemistry and physics teacher in New York City high schools, and research chemist. helping us understand that she did in fact get all of her knowledge from school and her jobs, but seeing as how we are taking out paragraph 3,the answer should be A