Respuesta :
The correct answer is A. Chronologically.
Explanation
According to the information in the question, it can be affirmed that the author wrote the information in chronological order because it coincided with the birth of Gertrude Belle Elion in 1918, later referring to the title in biochemistry that she obtained in 1937. Then It refers to the multiple works that she carried out in parallel that she was studying to obtain the master's degree in 1941. As a reference, it has three dates that are ascending, so it can be said that the writing is chronological. So, the correct answer is A.