Which of the following are among long term effects thus far observed?

• A. 1 and 2
• B. 1 and 3
• C. 2 and 3
• D. 1, 2, and 3

Answer: (D)

Long-term effects are outcomes that show up after a delay following exposure and are supported by studies conducted over time. If every item listed has credible evidence of appearing as a delayed consequence, the only option that includes all of them is the best choice. This reflects how the knowledge base about delayed outcomes comes from longitudinal data, follow-up studies, and population research that consistently demonstrate multiple late effects. So, when each of the three potential effects has documentation backing its status as a long-term consequence, the statement that all three have been observed best represents the current understanding.