I had to disclose the information due to some reasons.

discuss
review
suppress
expose

The correct answer is D. expose.

To expose something means to make it known to the public, often in a way that is damaging or embarrassing. In the context of the question, the speaker is saying that they had to make the information known to the public, even though it was something that they would have preferred to keep private.

The other options are not as accurate. To discuss something means to talk about it, often in a group or meeting. To review something means to look at it carefully and make sure that it is correct. To suppress something means to keep it hidden or secret.

In this case, the speaker is not talking about discussing, reviewing, or suppressing the information. They are talking about exposing it.