What’s unique about Patz’s paper is that the figures are from ______.

A．help Catholic nuns and priests fight against Alzheimer.
B．explore the possible causes of dementia’s risk.
C．find out who are at risk of developing a form of dementia.
D．determine the effects of the presence of brain plaques.

A．Using the energy conservation hypothesis to categorize the positions of birds.
B．Using fluid dynamics and energy wave configuration calculations.
C．Using photography to analyze various flock formations.
D．Using knowledge of birds’ visual axes, "blind spots" and field of vision.