Consider making a calc that builds a string consisting of ones and zeros (or X and O, or any two distinct values) based on the three choices.
Value for Customer-A might look like "0001001010", and customer-B "0111000000", etc. You can create a report of this calc, and give a count of the various values.
On the flip side, it would be pretty easy to sum up the number of Option-1 choices, and Option-2 choices, etc.. but this won't give you trends of popular combinations, which is what I think you are really going for.
A lot of this depends on how your data is shaped too.