Question

to keep on doing something until it is done is to be:
○ tenacious
○ versatile
○ judgmental
○ unprejudiced

Explanation:

To solve this, we analyze the definitions: "tenacious" means persistent in doing something until completion. "Versatile" refers to adaptability in many areas, "judgmental" is about being critical, and "unprejudiced" means unbiased. The description matches "tenacious".

Answer:

A. tenacious