Which of the following statements in supported by the passage?

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A．The sun shines constantly and gives out the same amount of energy every year．

B．The cause of the sun’S fluctuations is its loss of energy with each passing year

C．It is sure that the energy sent out by the sun will drop when more sun spots appear．

D．Fluctuations in weather pattems are the results of the pull of gravity．

参考答案:

C参见第四自然段“…as the size and number of sun spots increased，the over-all energy sent out by the sun would：decrease”可得知C正确。