According to Schumpeter the entrepreneur makes economic profit because

He is an innovator
All his risks are insurable
The uncertainity is reduced
Most of his decisions are non-routine

The correct answer is: A. He is an innovator.

Schumpeter argued that entrepreneurs are the driving force behind economic progress. They are the ones who introduce new products, new processes, and new ways of doing business. These innovations create new markets and destroy old ones, leading to economic growth.

Schumpeter also argued that entrepreneurs are rewarded with economic profit for their innovations. This profit is a reward for the risk they take and the uncertainty they face. It is also a reward for the creative destruction they bring about.

Options B, C, and D are incorrect.

Option B is incorrect because not all risks can be insured. For example, the risk of a new product failing is not insurable.

Option C is incorrect because uncertainty is always present in the economy. Even if an entrepreneur is able to reduce uncertainty, they will still face some risk.

Option D is incorrect because not all decisions made by entrepreneurs are non-routine. For example, an entrepreneur may make routine decisions about how to manage their business.

In conclusion, the correct answer is: A. He is an innovator.