C is the correct answer.
Since commas connects 2 sentences.
Answer:
The answers are: HE IS, YOU ARE, IT IS, ARE, AM.
Explanation:
The first blank is "he is" because Robert is referring to Michael and his location. The second blank is "you are" because Michael is replying that Sarah is right. The word "your" would not be correct here because "your" is a possessive term. The third blank is "it is" because he is referring to the book being his. The fourth blank is "are" because he is asking if Sarah is in his class. The last blank is "am" because Sarah is stating that she is a student in the same math class.
To have three main points your writing about in your topic. For example.... Timmy likes bread because it's tasty, delicious, and healthy
