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Engineer1
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Engineer1
Please review my reasoning. Thank You in advance.
Your reasoning makes sense.

The one thing I would change about what you said is your use of the term "irrelevant."

I think you mean "not supported" rather than "irrelevant" since the question is about what follows from the argument rather than about a choice that affects the argument.
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Telomerase is an enzyme that is produced only in cells that are actively dividing. Thus, as a rule, it is not present in adult tissue. Bone marrow is an exception to this rule, however, since even in adults bone marrow cells continually divide to replace old blood cells. Cancers are another exception, because their cells are rapidly dividing.

The information provided most strongly supports which of the following?

A. Telomerase is the only enzyme that is present in cancerous cells but absent from cells that are not actively dividing.
B. Embryonic tissue is less likely to become cancerous than tissue that has ceased to actively divide.
C. The presence of telomerase in bone marrow is no indication of bone marrow cancer.
D. Cancer of the bone marrow develops more rapidly than cancer growing in any other kind of adult tissue.
E. The level of telomerase production is always higher in cancerous tissue than in noncancerous tissue.

I saw a similar GMAT prep question on the forum with somewhat different wording. I could not find this exact question on the forum, so I am posting it. I will also explain my reasoning.

Here is that similar question, by the way: Telomerase is an enzyme that is produced. May I ask where exactly you encountered this question? Thank you.
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This is from GMAT Prep Practice Exam 3. Yes I saw the other one on the forum, but the wording is different. If it’s allowed, I will share a snapshot.

Posted from my mobile device
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This is from GMAT Prep Practice Exam 3. Yes I saw the other one on the forum, but the wording is different. If it’s allowed, I will share a snapshot.

Posted from my mobile device
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Engineer1
This is from GMAT Prep Practice Exam 3. Yes I saw the other one on the forum, but the wording is different. If it’s allowed, I will share a snapshot.

Posted from my mobile device
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Why is it not D? Isn;t it implied?

For C - it can indicate bone marrow cancer too
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Why is it not D? Isn;t it implied?

For C - it can indicate bone marrow cancer too
We expect there to be telomerase in bone marrow, since even in adults bone marrow cells continually divide to replace old blood cells. So the presence of telomerase in bone marrow does NOT indicate bone marrow cancer.

Could bone marrow cancer exist? Sure, but the presence of telomerase still is NOT a sign of the cancer.

In other words, even if there is cancer, a positive test result for telomerase in the bone marrow is not enough to let the doctor know that the cancer exists. Some other test(s) would need to be done, because the presence of telomerase alone is not an indication of bone marrow cancer. So (C) is correct.

(D) is out because the passage doesn't say anything about the RATE of cancer growth in bone marrow vs. in other kinds of tissue.

I hope that helps!
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