Answer:
D. Hiring part-time employees to save on costs
Step-by-step explanation:
Economics is concerned with how society allocates available scarce resources to meet unlimited needs and wants of its members. It involves making choices on how to use limited resources in the most efficient ways. An economic decision is a decision that requires the use of few resources to generate maximum gains.
From the options presented, the hiring of workers on a part-time basis to save costs is an economic decision. The decision will see the company use few resources to make profits. The other options do not involve attempts to increase the efficient use of resources.