New real estate disclosure regulations require sellers and their agents to tell prospective buyers about any existing problems with the property. previously, they were expected only to answer buyers' questions. the new regulation addressed the marketing ethics problem of:

The correct answer is withholding information

Explanation:

When a real estate agent retains or hides information directly related to the property or that is waiting to be sold, it is considered unethical. However, there may be legitimate reasons to retain information temporarily. For example, it is ethical to retain the names of dead victims until families are notified. Sometimes it is necessary to retain strategic information due to national security concerns, for example, a case involving the ongoing investigation of a terrorist plot. Or sometimes it is a good option to temporarily retain information that could unnecessarily scare the public.

answer; i believe the correct answer is (a) purchase of treasury stock;