Answer:
C. by causing mutations in genes
Explanation:
Smoke can induce mutations in genes causing tumors such as lung cancer
Ms. A may have hypothyroidism as the body may not be producing enough amounts of the thyroid hormones T3 and T4. Ms. A is exhibiting common signs of the condition such as fatigue, hair loss, skin changes, temperature fluctuations, and lethargy. Maybe get her to do some blood tests to measure T3 and T4 levels.<span>
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<em>1. Some tumors are benign, which means they form in only one spot without spreading to surrounding tissue. Malignant tumors are cancerous and can spread to nearby tissue.</em>
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<em>2. A benign tumor is not a malignant tumor, which is cancer. It does not invade nearby tissue or spread to other parts of the body the way cancer can. In most cases, the outlook with benign tumors is very good. But benign tumors can be serious if they press on vital structures such as blood vessels or nerves.</em>
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<em>3. Although some tumors are benign and consist of noncancerous cells, others are malignant. Malignant tumors are cancerous, and the cells can spread to other parts of the body.</em>
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<em>4. Malignant tumors are cancerous (ie, they invade other sites). They spread to distant sites via the bloodstream or the lymphatic system. This spread is called metastasis.</em>
