Question

how often should you replace your firefly batteries and check the expiration of your pml?

annually

monthly

quarterly

semi-annually

Explanation:

In medical or equipment maintenance related to devices like firefly (likely a medical device) and PML (possibly a medical label or device component), the standard practice for replacing batteries and checking expiration of such items is often on an annual basis. Monthly is too frequent, quarterly is more than needed for typical battery and expiration checks, and semi - annually is also not the standard compared to annual checks for these types of equipment - related maintenance tasks.

Answer:

A. Annually