题目内容：
Which of the following statements in supported by the passage?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：