I believe the answer is:
building a highway
funding a pre-K program
creating a new technological device
An action would be considered as an investment if it provide a potential return in the future.
Building a high way would reduce the transportation cost that businesses must pay to deliver their products, funding pre-K program would improve labor qualities in the future, and creating a new technological device would make the production process much more efficient.
1. building a highway
2.funding a pre-K program
3.creating a new technological device