To answer this question, we need to understand the general etiquette and expectations regarding phone call responses.
Option A) Also within 24 hours - This option is incorrect because while emails should generally be replied to within 24 hours, phone calls are typically expected to be responded to more promptly.
Option B) Within 2 hours - This option is incorrect because while it is important to respond to phone calls promptly, a response within 2 hours may not be feasible or necessary in all situations.
Option C) Within 4 hours - This option is the correct answer. Returning a phone call within 4 hours is considered a reasonable and timely response in most cases. It shows professionalism and respect for the caller's time.
Option D) By the end of the business day - This option is incorrect because it implies a longer response time compared to the expected timeframe for phone call responses. While responding by the end of the business day may be acceptable in some cases, a quicker response within 4 hours is generally preferred.
The correct answer is Option C) Within 4 hours. This option is correct because returning a phone call within 4 hours is considered a reasonable and timely response.