Final Answer:
The NJ speed limit in a business or residential area, unless otherwise posted, is 25 mph. Option B is the answer.
Step-by-step explanation:
In New Jersey, the default speed limit for business or residential areas is 25 mph, as specified by state traffic regulations. This speed limit is designed to enhance safety for pedestrians, residents, and other drivers in these areas. It is essential for drivers to be aware of and adhere to speed limits, contributing to the overall well-being of the community.
However, it's crucial to note that specific areas may have different speed limits posted, so drivers should always be attentive to traffic signs indicating any variations from the default speed limit.
Option B is the answer.