Insert the most appropriate homonym This candy costs 50 _______.

The most appropriate homonym for the sentence "This candy costs 50 _______" is cents.

• Scents means a smell or fragrance.
• Cents are a unit of currency equal to one hundredth of a dollar.
• Sents is not a word.

In the sentence "This candy costs 50 _______", the speaker is referring to the monetary value of the candy, which is measured in cents. Therefore, the correct homonym is cents.