Step 1: Analyze statement A.
Tornadoes are small-scale weather events but are known for having the most violent winds on Earth, making this statement generally accepted as correct.
Step 2: Analyze statement B.
This statement is fundamentally incorrect. Tornadoes are characterized by an extremely low-pressure center. Air spirals violently inward and upward toward this low-pressure core. High-pressure centers are associated with calm, sinking air and fair weather.
Step 3: Analyze statement C.
A tornado's funnel cloud is made visible by condensed water droplets (the cloud itself) and the dust, debris, and soil it picks up from the ground. This gives it its characteristic dark color. This statement is correct.
Step 4: Analyze statement D.
The classic visual appearance of a tornado is a funnel-shaped cloud extending from the base of a thunderstorm to the ground. This statement is correct.
Conclusion: Statement B is incorrect.