. Sudden infant death syndrome (SIDS) is
A. on the rise in the United States.
B. a death in a crib with a snug-fitting mattress.
C. death from antibiotic-resistant infection.
D. a death of a seemingly healthy infant from no apparent cause.

The answer is D. SIDS is the name given to an infant when they suddenly die for no apparent reason usually in their sleep. It has been given the informal name of crib death because the infant is usually found in their cribs because a majority of the time it happens during sleep.

~Hope this helps