Talk: if the word "did"(helping verb) is in front of the word it is meaning that someone spoke in the past, but if the helping verb "will" is before the word it means that someone is going to speak in the future (most likely about to start talking)
talk-"ing": the same thing as "talk" EXCEPT "ing" is a suffix which means presently, so "talking" means that someone is currently speaking.
talk-"ed": once again the same thing, however, the suffix "ed" means already DID or in the past.
talk- "en": actually this is sadly not an english word, but the suffix "en" means made of. For example, "golden" means MADE OF gold.
Hope this helped:)
The correct answer is D. Elion and her colleagues were responsible for developing important drugs.
Explanation
The statement that best summarizes the main idea of the extract is D. "Elion and his colleagues were responsible for the development of important drugs." This can be affirmed because in the extract the author says that "Elion joined the Burroughs Wellcome Laboratories" clarifying that Elion began working in laboratories where medicines were manufactured. Later, the author refers that "Elion and Hitchings developed a variety of new drugs that were effective against leukemia, autoimmune disorders, urinary tract infections, gout, malaria, and viral herpes," in this part of the Extract is where it is directly mentioned what Elión and Hitchings did when they worked in the laboratory. Additionally, some of the diseases that were cured with the medicines they had developed such as leukemia, gout, malaria, among others, are mentioned.
The Tet offensive proved that not only did the Viet Cong have the desire to fight back, but also the ability. It killed many US soldiers and set the war strategies back a bit. This added deeper conflict and dread to American fighters as well as American civilians.
i think it it is stimution
