_____ may cause miscarriage and low birth weight for a developing embryo.

• A. Rubella
• B. Mercury
• C. Syphilis
• D. Caffeine

Answer: (D)

Verified step by step guidance

1. Identify the key terms in the problem: miscarriage, low birth weight, and developing embryo.
2. Understand that the problem is asking about substances or conditions that can negatively impact prenatal development.
3. Review the potential effects of each option provided: Rubella, Mercury, Syphilis, and Caffeine, on pregnancy.
4. Recognize that Rubella is a viral infection that can cause congenital rubella syndrome, leading to serious birth defects.
5. Consider that Mercury is a heavy metal that can lead to neurological damage in a developing fetus, and Syphilis is a sexually transmitted infection that can cause miscarriage or stillbirth. Caffeine, in high amounts, is associated with increased risk of miscarriage and low birth weight.