Which of the following best defines the term economic investment

A. reducing the size of the workforce B. exhausting the available resource supply C. developing a benefit package for the labor force D. putting money into acquiring or improving capital goods

Investment means that you place your time, money or other good into something with the hope of receiving something in return. So, from the options the correct answer is the following one:

D. putting money into acquiring or improving capital goods

This means that you invest the money and you hope to receive more money in return