Mr. Reyes started to fix his motorcycle at 7:45 a.m. and lasted until 8:30 a.m. For how long did he fix his motorcycle? ___ 18. What is asked in the problem? A. The length of time Mr. Reyes fixed his motorcycle. B. The time Mr. Reyes started to fix his motorcycle. C. The time Mr. Reyes finished fixing his motorcycle. D. The work done by Mr. Reyes. ___ 19. What operation is needed to solve the problem? A. addition B. subtraction C. multiplication D. division ___ 20. What is the complete answer? A. Mr. Reyes fixed his motorcycle for 40 minutes. B. Mr. Reyes fixed his motorcycle for 45 minutes. C. Mr. Reyes fixed his motorcycle for 50 minutes. D. Mr. Reyes fixed his motorcycle for 55 minutes.​