What can a business do to improve its productivity?

Lower salaries

Reduce its workforce

Sell assets

Invest in capital

Lowering salaries cannot do any good to the productivity because of the workers will loss the urge to do well. Reduction of workforce will also decrease the production. Selling assets cannot affect that much to the production. However, the investment of capital will allow the company to do some adjustments and improvements including the productivity.

I believe the answer is C. Sell assets