Aaron Has Been Trying to Improve His Time in the 100

Multiple Choice

Aaron has been trying to improve his time in the 100 metre run. He often practices at the track late at night with his girlfriend timing him. To his amazement, when his friend, Benjamin, who is an excellent runner, volunteers to run with him, his time actually ________.

A) worsens due to Benjamin's speed
B) improves due to the mere presence of another person
C) improves due to Benjamin's speed
D) worsens due to the mere presence of another person