Final answer:
Cribs must be equipped with a Plexiglas cover during transport to ensure the infant's safety by protecting against environmental factors and accidental contact.
Step-by-step explanation:
The question addresses an aspect of infant safety particularly in the context of transporting a crib. The correct answer to "Cribs must always be equipped with a _________ _____ during transport" is C) Plexiglas cover. A Plexiglas cover on a crib during transport can help protect the infant from environmental factors like wind, rain, and debris. Moreover, it can prevent unintentional contact or accidents while moving the crib. It's essential to ensure the safety of infants during transport and a Plexiglas cover is suitable for this purpose since it is sturdy, clear for visibility, and provides a solid barrier.