Answer:
It would be faster for a human resource manager to use an e-mail to alert employees about a company picnic.
Step-by-step explanation:
Companies and corporations issue corporate emails to their employees so they can have an internal communication link. These are used for work related activities, where employees can share their work with their team or managers, ask questions, maintain an active communication with other employees, etc. Employees have to check their corporate email on a daily basis, so this would be the best way to make sure that all employees are aware of the company picnic. The human resource manager can simple send an email with the picnic information to all employees.