Consider a 2018 School Bus That Has the DPF Warning

Consider a 2018 school bus that has the DPF warning lamp illuminated. The amber light is on steadily. What is the most correct service recommendation?

A) Drive the vehicle under load at a moderate speed for 20-40 minutes.
B) Use a dash switch to initiate a stationary regeneration.
C) Use OEM software to initiate an active regeneration.
D) Tow the vehicle to a service location and replace the
DPF)