Respuesta :
Answer:
Insert a comma between causes and an.
Explanation:
The comma. It is a punctuation mark used to mark divisions in the text (which can be caused by phrases or conjunctions). The comma should be used to separate elements that you could use to make a list. In the paragraph presented in the question, you are listing things done by Ted Kennedy, for that reason, you should put a comma between the words "causes" and "an."