According to the last paragraph, the role played by Mr. Potato Head is______.

A．Mr. Potato Head "got married" when he was in his forties
B．Mr. Potato Head was first designed as a toy that can be eaten
C．the non-toy factories began to make Mr. Potato Head toys at last to earn money
D．Mr. Potato Head was nothing more than loved by children nowadays

A．The departing ships seemed to be smaller and smaller when they sailed away.
B．The greater a concentration of mass is at the poles, the stronger its gravitational pull.
C．The length from Earth's center to sea level at tile equator is longer than that at the poles.
D．The changes in the rising of a few millimeters on Earth's surface detected by modern devices.