Topic: Synonyms,

Best Answer Explained in Below-:

The term "panacea" originates from the Greek word "panakes," which means "all-healing." In its most common usage, it refers to a remedy or solution that is purported to cure all ailments or problems. Hence, option D, "cure all," aligns perfectly with this definition, emphasizing its role as a universal solution to various issues, particularly in medical contexts.

Looking at the other options:

A) "widespread disease" runs counter to the meaning of panacea, as it suggests a condition that requires treatment rather than a solution.
B) "gland" is unrelated and pertains to biological functions, not remedies or cures.
C) "fresh," while a positive attribute, bears no relation to health remedies or solutions and does not encapsulate the essence of a panacea.

In the context of discussions on health, wellness, and problem-solving, the notion of a panacea evokes the ideal of a singular, effective solution to multiple challenges—hence making option D the most fitting and accurate choice.