why CoulDn't toDD AnD junE FinD out who sEnt thEm thE tiCkEts
A．thEir FriEnDs wAntED to kEEp it A sECrEt.
B．thE lEttEr with thE tiCkEts wAs not signED.
C．thErE wAs no lEttEr with thE tiCkEts.