Answer:
The only accurate description of the relationship between pressure gradients and wind given in the previous sentences is: A strong pressure gradient will generate fast winds.
You have to understand that:
1) A pressure gradient is a difference in barometric pressure between the near point.
2) Air is a compressible fluid
3) because 1) and 2) a pressure gradient will generate an airflow from the point with the highest barometric pressure to the one with the lowest barometric pressure (this is call wind).
Therefore, if the pressure gradient is stronger, the fluid flow will be stronger (and the speed of the wind).