Explanation

Option A is correct: Increasing business investment most likely results in the largest increase in per capita output.

Economic reasoning:

With fixed labor supply:

• Per capita output = Total output ÷ Number of workers
• To increase per capita output, you need to increase productivity
• Business investment in capital goods, technology, and equipment directly boosts labor productivity

Why business investment is most effective:

• Directly increases capital per worker
• Enhances technology and production efficiency
• Creates economies of scale
• Drives innovation and productivity gains

Foreign investment (Option B):

• While beneficial, its impact is more indirect
• May focus on specific sectors rather than economy-wide productivity
• Benefits depend on how capital is allocated

Key concept: In developed economies with stable labor forces, productivity growth through capital investment is the primary driver of per capita output growth.