The correct option is
E were told/was being questioned
Option E is the correct answer because the combination must be in the same tense, be it present or past or future, because the statement is such that if the correct combination of either of the tenses is applied, it would be correct.
Here, "were told" and "was being question" are both in simple past tense, and are correct because "were" is used as past tense of "are" in plural form, and"was" is used as past tense of "is" which is singular.
Option A is incorrect because "we told" to wait means that they told something but it is incorrect because according to the statement they were told and they did not tell.
Option B is incorrect because "man questioned" again means that he was asking question which changes the meaning of the statement.
Option C is incorrect because "is questioned" is in present tense while "were told" is in past tense.
Option D is incorrect for same reasons as A.