Review the facts and answer the question below:
• Glenn Ridge employees work 7am-3pm, 9am-5pm, 10am-6pm, or telecommute
• Office hours are determined according to the conditions listed below
• All sales employees must work 9am-5pm unless conducting a sales call at a client's office
• All sales employees conducting a sales call at a client's office telecommute
• All accounting employees work 9am-5pm except the collections manager who works 7am-3pm
• Production employees work 10am-6pm
• Any employee not previously mentioned works 9am-5pm
What time must John, a Program Manager in the Production Department, start work? A) 7am B) 9am C) 10am D) 12pm