Task: Question Answering
Input (English): Question: The average weight of a group of persons increased from 48 kg to 51 kg, when two persons weighing 78 kg and 93 kg join the group. Find the initial number of members in the group?

 Option A: 76

 Option B: 28

 Option C: 23

 Option D: 98

 Option E: 32
Output (English): Option C