A sales representative plans to visit each of six companies M, N, P, Q, R and S exactly once during the course of one day. She is setting up her schedule for the day according to the following conditions:1. She must visit M before N. 2. She must visit N before Q.3. The third company she visits must be P. Which of the following must be true of the sales representative’s schedule?

• A. Visits M before Q
• B. Visits N before R
• C. Visits P before M
• D. Visits P before S