74. Which of the following statements is true?
(A) The Earth has been a solid figure that is entirely round ever since it was formed 4,500 million years ago.
(B) The deepest hole ever drilled into the Earth is nothing more than a pinprick in comparison with the whole vast globe we inhabit.
(C) Scientists have produced sufficient direct evidence, such as the patterns of earthquake waves, in support of their knowledge of the interior of the earth.
(D) It never occurred to scientists that the meteorites have the same origin as the Earth.