The missing options for this question are as follows:
1. Only positive outcomes can result from new technology in science.
2. Scientists should conduct long-term studies of DNA technology to determine the consequences.
3. There is no connection because they are different technologies.
4. Scientists should not use new technology; they should use the methods for pest control that are already available.
Answer- Option 2, Scientists should conduct long-term studies of DNA technology to determine the consequences.
Explanation: Pesticides are chemicals which are harmful for humans because they can be consumed through the crops, if the crops are not washed properly. Also, its harmful for farmers as well, who use them. Use of DNA technology can help farmers get the plants which are pest-resistant. The change in features, or production of some biomolecules in plants can resist them from being eaten up by pests. But this should be studied and given some time to see the results. Side effects of consuming these modified crops should be studied properly, because they should be harmless to humans and animals consuming them.