A. I play sport football, or cricket, every Sunday.
B. I play sport, football or cricket, every Sunday.
C. I play, sport football or cricket, every Sunday.
D. I play sport football or cricket, every, Sunday.
B. I play sport, football or cricket, every Sunday.
Explanation: The commas go around the extra bit of information that the sentence would make sense without.
Explanation: The commas go around the extra bit of information that the sentence would make sense without.