Question: A major difference between cancer cells and normal cells is that
A: Cancer cells have no telomere strands
B: Normal cells become cancerous when their telomere strands are used up
C: Cancer cells have no upper limit on cell division
D: Normal cells are protected from cancer when they have telomerase
Please eliminate two incorrect options first, then think it step by step and choose the most proper one option. Please answer in JSON format.
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