Final answer:
Prior to providing BMV to an infant with a flow-inflating bag, the respiratory therapist should position the infant supine with the neck: Neutral (Option C). This is to ensure a clear airway and effective ventilation.
Step-by-step explanation:
The correct position before providing Bag-Mask Ventilation (BMV) to an infant with a flow-inflating bag is to position the infant supine with the neck in a neutral position.
This facilitates optimal airway patency and minimizes the risk of airway obstruction that could occur with extreme flexion or extension.
It's imperative to ensure a clear airway when providing BMV to promote effective ventilation during resuscitation or when necessary.
Hence, the correct answer is Option C.