Final answer:
The expediency of filing a complaint with GREC depends on the issue, where emails are best for clear documentation and straightforward issues, and phone calls are effective for complex or urgent cases requiring immediate response.
Step-by-step explanation:
The most expedient method when asking GREC to investigate a complaint is likely to depend on the nature and urgency of the issue at hand. If you have a simple and straightforward issue, an email might be appropriate as it provides a written record and allows you to compose your thoughts succinctly. When proofreading the email, ensure that it conveys your message clearly and professionally. If, on the other hand, you need to explain a complex situation or present your point of view at length, a phone call might be more effective. This is especially true for serious problems that require real-time discussion and resolution, like challenging a grade or needing to change your work schedule. A phone call allows for immediate feedback and can sometimes lead to a quicker resolution. Communication via social media messages or a written letter, while valid options, may not be as prompt as email or a direct phone call.