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

### Question:
A recent study concluded that about 90% of all large predatory fish such as tuna have disappeared from the world's oceans in the past 50 years. Which of these is most likely the direct cause of this loss?

### Choices:
A. Urban development near the coast
B. Commercial harvesting from the ocean
C. Climate change on Earth
D. Acid precipitation over the oceans

### Answer:
