Which of the following is true about Polyvinylchloride earmolds?

Polyvinylchloride (PVC) earmolds are indeed known to be susceptible to body chemistry, which can lead to a reduced lifespan. This susceptibility is due to the fact that PVC can degrade when exposed to elements such as moisture and body oils, which can affect the fit, comfort, and overall performance of the earmold over time.

In contrast to other materials, PVC earmolds may become rigid or discolored and may not maintain their intended shape as effectively as other materials. This characteristic is important for hearing aid dispensers to consider, as it impacts the longevity and user satisfaction of the earmold.

The other options explore different attributes of earmolds but do not apply to PVC earmolds in the same way. For instance, while some materials might be better suited for severe hearing losses or be easier to modify, PVC has its own specific considerations, making option B the most accurate statement about its properties.