A boycott is when the people openly abandon something, like a boycott on overpriced video games. A repeal, however, is where a product is taken away from the people, not by the people's choice.
The correct answer for this question is this one:
"Congressional staffers must do homework and report back to the floor on what they've learned"
"special interest groups must step back and let the process works itself out"
"the language of the original bill will not change"
Hope this helps answer your question and have a nice day ahead.
Answer:In 1947, Salk took a position at University of Pittsburgh, where he began conducting research on polio, also known as infantile paralysis. By 1951, Salk had determined that there were three distinct types of polio viruses and was able to develop a "killed virus" vaccine for the disease.
Explanation:
