What type of airflow issue commonly occurs due to a blockage in dryer ducts?

When dryer ducts are blocked, it creates significant airflow issues that can manifest as both inconsistent airflow and overheating of dryer components.

Inconsistent airflow occurs because the blockage prevents the proper flow of air through the duct system. This disruption can lead to areas of stagnant air, which compromises the drying efficiency of the dryer and may prolong drying times for clothes. As the dryer struggles to push air through the obstructed ducts, the flow may become erratic or inadequate, leading to unsatisfactory drying results.

Additionally, the blockage can result in overheating of the dryer’s components. As the air cannot circulate effectively, the heat generated by the dryer’s operation becomes trapped. This increases the temperature within the dryer, which can lead to thermal damage to internal components, and significantly raises fire risks due to lint accumulation and overheating in the ducts.

Thus, both the issues of inconsistent airflow and overheating are direct consequences of a blockage in dryer ducts, making "both B and C" the correct choice.