Using a basket-shaped device, psychologists in the 1800s would measure the size and shape of one’s head to ______.

A．They didn’t notice them.
B．They gave mythological explanations.
C．They ignored them.
D．They chose to avoid seeing them.

A．To tell what "high tech" and "state of the art" are.
B．To tell how "high tech" and "state of the art" have developed.
C．To give examples of high tech.
D．To describe the modern technology.