After Two Technicians Examine a Broken and Disintegrated DPF Filter

After two technicians examine a broken and disintegrated DPF filter, Technician A says the filter damage was caused by water contamination. Technician B says the filter was damaged by back-to-back regenerations that occurred too frequently. Who is correct?

A) Technician A"
B) Technician B"
C) Both A and B
D) Neither A nor B"