What may happen to some applications?

The selection of "They may be rejected" is appropriate as it directly addresses a potential outcome of the application process. When dealing with applications, there is always a possibility that some of them may not meet the criteria or requirements set forth by the reviewing entity. This highlights the uncertain nature of the application process, where acceptance is not guaranteed, and rejection is one of the possible outcomes for applicants.

Other options suggest scenarios where the applications are either taken on positively—like being accepted, prioritized, or reviewed. While these are plausible outcomes, they do not capture the aspect of uncertainty and the possibility of rejection that the chosen response does. This makes "They may be rejected" a more representative choice concerning the range of eventualities that applications might face.