A．The United States Copyright Office created it.
B．It does not protect artists' techniques and procedures.
C．It has not been changed since its creation.
D．It is applied only to copies of the original work.
A．Remembering word definitions.
B．Recognizing repeated numbers.
C．Distinguishing between similar colors.
D．Tasting sounds.
A．To explain the causes of synesthesia.
B．To prove that sound and color can affect a person' s mood.
C．To determine whether or not synesthesia exists.
D．To show how creativity can be stimulated.