Query about question "If $t$ is an integer, which of the following must be..." [26]

https://www.gregmat.com/problems/quant?problem=if-t-is-an-integer-which-of-the-following-must-be


write your question here…THe question is wrong it should be like the equation must not be equal to zero. otherwise every number is divisor

So, all of the options could be divisors, right?

However, question said the answers must be divisors.