Question

which of the following statements concerning cancer is true?
cancer cells multiply at a rate that is beneficial to the human body.
cancer is caused primarily by bacterial infections.
cancer is the uncontrolled growth of foreign cells in the body.
cancer is the uncontrolled growth of human cells in the body.

Explanation:

• Analyze the first option: Cancer cells' rapid multiplication is harmful, not beneficial, to the body, so this is false.
• Analyze the second option: Cancer is mainly caused by genetic mutations, not bacterial infections, so this is false.
• Analyze the third option: Cancer cells are not foreign; they are abnormal human cells, so this is false.
• Analyze the fourth option: Cancer is defined as the uncontrolled growth of (abnormal) human cells in the body, so this is true.

Answer:

D. Cancer is the uncontrolled growth of human cells in the body.