Question

considering that nearly 85 percent of corn crops are genetically engineered, which impact does genetically engineered corn have on human health?
○ only positives can come from this type of technology, as seen in the ddt study.
○ human health will not be affected because scientists have studied this technology for over 50 years.
○ the genetically engineered corn has been proven to cause cancer in some human populations.
○ the long - term effects are unknown and have not been studied because it is a fairly new technology.

Explanation:

• Option 1: DDT had negative impacts (environmental, health), so claiming only positives is wrong.
• Option 2: Genetic engineering of crops is not 50+ years old; it's relatively new, so this is incorrect.
• Option 3: There's no conclusive proof that genetically engineered corn causes cancer in humans.
• Option 4: Genetic engineering of crops is a relatively new technology, so long - term health effects are not fully studied/known.

Answer:

D. The long - term effects are unknown and have not been studied because it is a fairly new technology.