Read the source of the allusion.

According to legend, when Damocles wished his life were as full of luxuries as
that of the tyrant Dionysis, Dionysis invited Damocles to a sumptuous banquet.
Above Damocles' seat at the feast, Dionysis had placed a sword, suspended only
by a thin hair, demonstrating the fragile nature of fortune.

What is the meaning of the allusion in the sentence below?

Brody was enjoying the lush life his newfound riches had brought him, but he couldn't
help but think of his latest cholesterol reading as a Sword of Damocles.

A-an unhealthy trend

B-a reminder that one is vulnerable

C- a consequence of overindulgence