How are operating expenses (OpEx) different from capital expenses (CapEx)?

How are operating expenses (OpEx) different from capital expenses (CapEx)?
A . OpEx are investments a company pays for up-front, while CapEx are the on-going costs to run a business.
B . OpEx includes software licenses with contracts that have user rights in perpetuity, while CapEx includes software services that are easily reconfigured.
C . OpEx is expenses for the day-to-day operation of a business, while CapEx is investments in assets.
D . OpEx has depreciation, while there is no deprecation with CapEx.

Answer: C