Which of the following is a possible event?

A) Pulling a blue sock from a drawer with 5 red socks and 4 pink socks.

B) Pulling a blue sock from a drawer with 1 blue sock and 8 pink socks.

C) Pulling a blue sock from a drawer of 9 red socks.

D) Pulling 2 blue socks from a drawer with 1 blue sock and 4 pink socks.