The owner of a life insurance policy who enters into a viatical settlement contract is...

Detailed Answer in Step-by-Step Solution:

A viatical settlement involves a terminally ill policyowner selling their life insurance policy for a lump sum. The policyowner in this transaction is called the viator (C).

The viatical settlement provider (A) is the entity purchasing the policy.

The viatical settlement broker (B) facilitates the transaction.

"Viatee" (D) is not a recognized term in this context.

The Virginia study guide defines the viator as the insured policyowner who sells their policy in a viatical settlement, typically due to a terminal illness. Reference: Virginia Life, Annuities, and Health Insurance study guide, section on "Viatical Settlements."