A

the heads of the states of US, UK, France, Germany, Italy, Canada, and Japan

B

the finance ministers of US, UK, France, Germany, Italy, Canada, and Japan

C

the heads of the states of US, UK, France, Germany, Russia, Canada, and Japan

D

the finance ministers of US, UK, France,Germany, Russia, Canada, and Japan

E

the heads of the states of US, UK, France, Germany, Russia, Italy, and Japan