A Participant Is Asked to Shadow a Message Presented to the Left

A participant is asked to shadow a message presented to the left ear while simultaneously ignoring a message presented to the right ear. During the experiment, which of the following statements reflects what the participant is LEAST likely to detect?

A) The right ear's message is initially presented in a high-pitched voice but is then spoken by a low-pitched voice.
B) The participant's name is mentioned three times at various points within the right ear's message.
C) Initially, the right ear's message contains a male voice reading a coherent passage, but this is then replaced by the same voice reading a sequence of random words.
D) The right ear's message is initially presented in a soft voice but is then spoken by a loud voice.