Physical deterioration in Florida is often caused by:

Poor design (A) can contribute to deterioration but is not specific to Florida. While poor design might exacerbate issues, it's not the primary cause of the accelerated physical deterioration seen in Florida's unique climate.

Nearby commercial development (C) relates to external obsolescence, which is a different type of value loss than physical deterioration. External obsolescence results from external factors affecting property value, not from the physical condition of the property itself.

Outdated electrical (D) represents a specific maintenance issue that could be addressed through renovation. It's not a widespread environmental factor like those in option B that cause unavoidable physical deterioration throughout Florida properties.