A, B and C traffic police have come to the following conclusion after the safety check of the city's passenger cars during this spring festival: A: all the passenger cars are overloaded  B: there is no overload problem on all the city's passenger buses
C: both Ruyi's and Jixiang's buses are overloaded
There is an overloading problem on the passenger cars of Jixiang, but there is no overloading problem on the passenger cars of Ruyi.