https://docs.google.com/forms/d/e/1FAIpQLSdC5LMhEGH-mtgf50hvIftxibuTK5DZWadlwjxy9vSGDS8JMQ/viewform
Đáp án đợt 2: 1d - 2c - 3b - 4c - 5a - 6b - 7d - 8d - 9d - 10b - 11a - 12c - 13c - 14a - 15a - 16a - 17a - 18c - 19c - 20c - 21b - 22c - 23b - 24b - 25d - 26d - 27b - 28a - 29d - 30b