Answer:
C will take 96 days alone to do the work.
Explanation:
given,
A and B work for 12 days...................(1)
B and C work for 16 days...................(2)
C and A work for 24 days...................(3)
Adding equation (1) and (2)

from equation (2)

hence, C will take 96 days alone to do the work.
Not sure what the options for the answer are (if there are any), but an appropriate entry in this box is "common goals," among other answers. Please let me know if you have any questions and provide me with the answer options if there are any.