The correct answer is: A. Inocculate.

The word "inoculate" means to introduce a vaccine into the body to protect against a disease. It is derived from the Latin word "inoculare," which means "to graft."

The word "inoculate" is often misspelled as "innoculate." This is likely because the two words sound similar. However, they have different meanings. "Innoculate" means to make someone or something free from sin or guilt. It is derived from the Latin word "innocuus," which means "harmless."

The words "inoculate" and "innoculate" are often confused because they sound similar. However, they have different meanings. "Inoculate" means to introduce a vaccine into the body to protect against a disease. "Innoculate" means to make someone or something free from sin or guilt.