Answer:
Send a memo.
Step-by-step explanation:
In this scenario, Ann needs to share information about a new hiring policy. She needs to communicate this information to more than one hundred employees. Thus, Ann should send a memo.
A memo, also known as office memorandum is a written message used as a means of communication of policies, decisions or procedures issued by an appropriate authority to another within the same organization.
Simply stated, an office memorandum is used to issue instructions or for communicating an action or decision reached by the executive arm of an organization to another, such as subordinates within the same organization.