Passage One Questions 26 to 29 are based on the passage you have just heard.

A．Both prefer cricket to baseball.
B．Both prefer baseball to cricket.
C．Mark disagrees with John.
D．It is not clear from the conversation.

A．They might eventually cause to lose sleep.
B．They help produce a neurotransmitter in the brain.
C．You must not drink milk if you take them.
D．They make it unnecessary to take naps.