A client recently lost significant function in the dominant hand following extensor tendon injury and presents with boutonniere deformity. Which is the BEST immediate course of action for the OTR to take in response to this client's hand function and impairment?
A. Dorsal blocking hand splint
B. Splint PIP joint in full extension
C. Splint PIP in full palm flexion
D. Resting position hand splint