To celebrate the "June 1st" International Children's day, a primary school in Jiguan District organized a total of 360 teachers and students to participate in the park activities. There are two types of buses a and B available for rent. The carrying capacity of the two types of buses is 45 and 30 respectively. It is required that each bus must be fully loaded, so the rental scheme for all teachers and students to arrive at the park at one time is () A. Three species B. four species C. five species D. six species

To celebrate the "June 1st" International Children's day, a primary school in Jiguan District organized a total of 360 teachers and students to participate in the park activities. There are two types of buses a and B available for rent. The carrying capacity of the two types of buses is 45 and 30 respectively. It is required that each bus must be fully loaded, so the rental scheme for all teachers and students to arrive at the park at one time is () A. Three species B. four species C. five species D. six species

If X type a buses and Y type B buses are rented, then 45x + 30y = 360, that is, 3x + 2Y = 24, when x = 0, y = 12; when x = 2, y = 9; when x = 4, y = 6; when x = 6, y = 3; when x = 8, y = 0. Therefore, there are five car rental schemes for teachers and students to arrive at the park at one time