Which of the following statements BEST describes the effects of an STI on physical health?

Some STIs can cause serious complications if they are untreated, including damage to vital organs, infertility, and in some cases death. The other statements are not generally true: infection does not mean a woman will have more children, and treatment is not always limited to two weeks. Therefore, the best answer is C, “Some STIs can attack vital organs, leading to death or continual major health issues.”

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