Answer:
c. covered
Step-by-step explanation:
The word "Encased" refers to the isolation of a body, covering it, protecting it, separating it from a particular event, isolating it from the surrounding environment.
Among the words given as an option to replace the word "encased" in the phrase "The mummy was encased in ancient gauze", the one that best fits and maintains the same meaning is the word "covered".