Cancer questions? (20)?

Question by nickoname: Cancer questions? (20)?
1.Which of the following best describes cancer?

A.When immune cells no longer function properly, cancer results.
B.Cancer is any disease for which there is no cure and no obvious infectious agent.
C.Cancer is cell division that gets out of control.
D.Cancer happens when certain cells, tissues, or organs begin to die without any obvious reason.
2.How are malignant tumors different from benign tumors?

A.Malignant tumors are not life threatening;

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