To estimate 320.8, we can round it to the nearest whole number, which is 321. Among the options provided, we need to find a sensible option. However, it seems the options are not directly compatible with this task.
To narrow it down as best as possible without direct rounding options to 321, a reasonable estimate might be around 25 given that it's a smaller number relative to the choices provided.
If you are looking for "best estimate" in terms of proximity, could you clarify if those numbers (16, 25, etc.) relate to a specific criterion or scenario?
Based on estimation context, it's unclear as is. Please provide additional information if applicable.