A
Below is a question with multiple-choice answers. Choose the correct option based on your reasoning.

### Question:
The mixing of cold Arctic Ocean water with warm surface Atlantic currents off the northwestern coast of Europe causes which effect?

### Choices:
A. sinking of water as it circulates southwest
B. reversal of current direction back toward the European coast
C. rise in water salinity and upwelling of affected currents
D. rapid evaporation and acceleration of currents toward the pole

### Answer:
