The correct answer is C. Panacea.
A panacea is a cure-all, a remedy for all diseases. The word comes from the Greek words pan, meaning “all,” and akos, meaning “remedy.” Panaceas have been sought throughout history, but none have been found.
The word panacea is often used figuratively to refer to anything that is supposed to solve all problems. For example, a politician might be accused of offering a panacea for the country’s economic problems.
The other options are not correct.
A stoic is a person who is indifferent to pain or pleasure.
A marvel is something that is amazing or astonishing.
Recompense is payment or compensation for loss or injury.