Nearly every weekend in the summer there are highland games somewhere

Nearly every weekend in the summer there are highland games somewhere in Scotland, but the biggest games are at Cowal. People from all over the world come to watch or take part. Over three thousand bagpipers and drummers play all day and there is a wonderful atmosphere. There are highland dancing competitions as well as events like throwing the hammer or 'tossing the caber'- throwing a large tree as far as possible. All the athletes wear traditional kilts.
WHAT MUST YOU DO IF YOU PARTICIPATE IN TOSSING THE CABER?
A) play a drum
B) throw the hammer
C) wear a kilt
D) throw a tree
E) dance