Final answer:
One who willfully procures another to commit perjury is guilty of Subornation of perjury, which involves persuading someone to lie under oath in a legal context.
Step-by-step explanation:
The correct answer to the question "One who willfully procures another to commit perjury is guilty of" is C) Subornation of perjury. Subornation of perjury is the crime of persuading or purposefully assisting someone to testify falsely under oath or affirmation. In this context, perjury refers to the act of lying or making verifiably false statements on a material matter in court, after having sworn to tell the truth. Solicitation of perjury would not be the correct term since it implies urging someone to commit a crime, whereas subornation of perjury indicates that the person has gone further to procure the false testimony.