Explanation:

- A, B, and C together work for 36 days to complete the task. This implies their combined work rate is 1/36 of the work per day.

- A and B together do five times the work C does alone, so their work rate is 5 times C's.

- B and C can complete the task at the same rate as A alone, meaning their combined work rate is equal to A's.

- We need to find n, where A and C together work n times the rate of B alone.

To solve:

- Let C's daily work rate be x.

- Hence, A + B's daily work rate is 5x.

- Let B's daily work rate be y.

- Then, A's daily work rate is (x + y) (from B and C's work rate).

- From A + B + C's collective rate, we have: (5x + x) + x = 1/36; simplifying gives x = 1/216.

- B and C’s total rate is 1/216 + y = A’s rate.

- Now, A and C's rate is (1/216 + 1/216) = 1/108; meanwhile, B’s rate is (1/216).

- Hence, n = (1/108) / (1/216) = 2.

?? Correct Answer: Option 2, which is 2.