The correct answer would be B, listen for total meaning.
The correct sentence is (A). In this example the author stablishes a good parallel structure when he/she enumerates the items. Commas must not be used in an independent clause; in particular, before a verb (the comma before “were” is not correct as an example B).
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the answer to your question is the civil rights movement caused the assassination of Dr.Martin Luther King Jr. However, you'd better try to write it yoursefl or rather check Prime Writing site whether they have a similar article on their blog.
Impropriety, it was considered to be disrespectful to the women and her husband.