Task: Question Answering
Input (English): Question: A firm has 2 senior partners and 5 junior partners. How many different groups of 3 partners can be formed in which at least one member of the group is a senior partner? (Note that two groups are considered different if at least one group member is different.)

 Option A: 17

 Option B: 21

 Option C: 25

 Option D: 29

 Option E: 33
Output (English): Option C