I'm going to say B because the other answers just don't seem to make sense.
Explanation: According to the U.S. Census Bureau, there is one birth every eight seconds in the United States, or about 10,800 births per day. Worldwide, approximately 350,000 to 400,000 people are born daily on average.
I would probably say C. economic class
Answer:
The triceps are the extensor muscles of the elbow joint.
