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【单选题】
下列关于食物链和食物网的说法中，不正确的是A.
生态系统中的物质和能量是沿着食物链和食物网流动的
B.
一条食物链中消费者和生产者的关系主要是吃与被吃的关系
C.
一个生态系统中，很多条食物链彼此交错连接，形成了食物网
D.
大多数食物链是由生产者、消费者和分解者三者共同组成的
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