Answer: Total visits, error rates, and latency from Asia

The question asks for metrics to measure success against business and technical goals for an application serving traffic in Asia. Option C ('Total visits, error rates, and latency from Asia') is optimal because it comprehensively addresses both business and technical requirements. Total visits assess capacity optimization and expansion success in Asia (business goal). Error rates directly measure service availability and support (business goal), as high errors indicate service unavailability. Latency from Asia targets the technical goal of decreasing latency in the region. Option D ('Total visits and average latency for users from Asia') is less suitable because it omits error rates, which are critical for evaluating service availability—a key business requirement. Options A and B are incomplete, focusing only on error rates or latency difference, respectively, while Option E (character sets) is irrelevant to the goals. The community discussion supports C, with the highest upvoted comments (e.g., JohnWick2020 with 27 upvotes) emphasizing that error rates are essential for availability, and C provides a more complete metric set without unnecessary restrictions.

Author: LeetQuiz Editorial Team