[ Grammar ]
Which sentence is written correctly?
A. My three favorite classes are math, science, and PE.
B. My three favorite classes are math science, and PE.
C. My three favorite classes are math, science and, PE.
D. My three favorite classes are, math, science and PE.

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Question Tag › View
Eric and Alex aren’t classmates, ______________?
A. are they
B. is he
C. don’t they