I belive that the answer my be c but how they worded it made my probablitity calculations a bit harder.
1,207+958=2,165 people
Hope this helps!
There are 17,576 combinations.
There are 26 letters to choose from for the first letter; 26 for the second letter; 26 for the third letter; and 1 for the last letter (it must be the same as the first letter). This gives us
26*26*26*1 = 17576