Which Approach Would Probably Be Most Successful with a Group

Which approach would probably be most successful with a group of two-year-olds?

A) teaching them to play instruments together as a unit
B) providing a range of child-sized orchestral instruments -- guitars, violins, and trumpets
C) making a set of percussion instruments available - drums, rhythm sticks, tambourines, and maracas
D) waiting until they are three before introducing them to musical instruments of any kind