R44 and up train cars are equipped with what horsepower traction motors?

The correct choice specifies that R44 and up train cars are equipped with four 115 horsepower traction motors. This configuration supports the operational requirements of these train models, ensuring they have sufficient power for acceleration, speed maintenance, and overall performance on the tracks.

Having four traction motors, each rated at 115 horsepower, allows these train cars to effectively distribute power across multiple axles. This enhances not only their driving performance but also their ability to handle varying loads and track conditions. Such an arrangement is critical for providing a balance of power, efficiency, and reliability, which are essential attributes for modern rail operations.

The other options reflect different configurations of traction motors that are not consistent with the specifications for R44 and up train cars. Each of them presents a different number of motors or horsepower ratings that do not align with the data known about these specific train models.