Final answer:
The nurse should first assess the client's current condition and vital signs.
Step-by-step explanation:
The nurse should First assess the client's current condition and vital signs (Option D).
Warfarin is an anticoagulant medication that is used to prevent blood clots. Missing doses of warfarin can increase the risk of blood clots forming in the client's body. Therefore, it is important to assess the client's current condition, including vital signs, to determine if there are any signs of blood clot formation.
After assessing the client, the nurse should then notify the provider about the missed doses (Option B) and document the omission in the client's chart (Option C).