First of all, find the range of numbers which satisfy the first condition |z| ≤ 1 i.e. -1 ≤ z ≤ 1
We can now take a number or two (choose one positive and another negative) between -1 and 1 and verify the options.
Aways keep in mind that these question types will mention MUST or COULD. The answers vary because of the wording.