One way service businesses communicate a higher level of service quality to their customers is by having their employees be clean, sharp looking, and dressed in appropriate uniforms. This is a way to address the characteristic of services.

Intangibility

Explanation:

The intangibility refers to the unseen and untouchable in a nature that means no one can seen or even touched and contain the intangible in a nature

And we also know that the service is an intangible in nature as we cannot seen or even touched the service.

So in the given case, since the businesses want to communicate the higher level of service by their employees via clean, sharp looking, and well dressed so it reflects the intangible service characteristic

answer; i believe the correct answer is (75 years);