Which Phrases BEST Characterize (1) Co-Sleeping and (2) Sudden Infant

Multiple Choice

Which phrases BEST characterize (1) co-sleeping and (2) sudden infant death syndrome (SIDS) ?

A) (1) fairly common; (2) rare
B) (1) rare; (2) fairly common
C) (1) rare; (2) rare
D) (1) fairly common; (2) fairly common