What is the purpose of the cause-and-effect signal word “therefore”? it signals to the reader that there is more information about the research surrounding how much time should be spent at recess. it signals to the reader that the writer is going to offer an opposing view about how much time should be spent at recess. it signals to the reader that the person has come to a decision about how much time should be spent at recess. it signals to the reader that the idea of how much time should be spent at recess is debated due to different research findings.

It signals to the reader that the person has come to a decision about how much time should be spent at recess.

Explanation:

The word "therefore" is commonly used in essays that follow a "cause and effect" structure. This is because the word indicates a conclusion that has been reached based on factors that have been previously analyzed. In this passage, it is likely that the author looked at several factors that could influence how much time is spent at recess. Based on these factors, the author reached an informed conclusion, which he introduces by using the word "therefore."

letter c

It signals to the reader that the person has come to a decision about how much time should be spent at recess.

the sentence that avoid faulty coordination is:

culture, which is well represented in philadelphia, plays a major role including theatre, music, and the visual arts.  

faulty coordination occurs when the writer gives equal importance two different ideas (clauses) which in fact are not equivalent. in order to correct a misplaced clause or idea, the writer can place less important or emphatic ideas in a relative clause as in the previous sentence.