What is the correct usage of the word "knives" in this sentence?

Explanation:

The correct answer is C. 'knives'. The word 'knives' is the plural form of 'knife'. Since the sentence is referring to multiple steak handles, we need to use the plural form of the noun. In this case, we need to use the possessive plural form, indicated by the apostrophe after the 's' in 'knives'.

For example, if we had a single steak handle made of ivory, we would use the phrase 'The steak knife's handle is made of ivory'. But since there are multiple handles, we need to use the plural form: 'The steak knives' handles are made of ivory.'