In each of the following sentences, there is a blank space. Below each such sentence, there are five options with one word each. Fill up the blank with the word that makes the sentence grammatically and contextually correct.
Last week, Director of National Intelligence said she is __________internal chat rooms for any misconduct by employees.

The blank needs a verb to indicate the action that the Director is performing. In this case, the sentence structure suggests that the Director is actively investigating or looking into something, which is why "probing" (meaning investigating or examining thoroughly) is the appropriate choice.

"Perceiving" refers to becoming aware of something, but doesn't convey the active investigation implied in the sentence.

"Plundering" means stealing, which is not appropriate here.

"Pondering" means thinking deeply about something, which doesn’t fit the context of an investigation.

"Plighting" refers to promising or swearing something, and is unrelated to the idea of investigating misconduct.

Therefore, "probing" is the correct choice.