IMO B
The argument provides a reason for not banning a known danger, which is to prevent a heavier danger (skating in the streets).
In option B the use of insecticide generates more damage from the insecticide resistant insects that now are being killed by the wasps, than from the aphids (less damage), therefore we are preventing a heavier damage by not using the insecticide.
Town Councilor: The only reason for the town to have ordinances restricting where skateboarding can be done would be to
protect children from danger. Skateboarding in the town's River Park is undoubtedly dangerous, but we should not pass an ordinance prohibiting it. If children cannot skateboard in the park, they will most certainly skateboard in the streets. And
skateboarding in the streets is more dangerous that skateboarding in the park.
(b) Insecticides are designed to
protect crops against insect damage. Aphids damage tomato crops, but using insecticides against aphids kills wasps that prey on insecticide-resistant pests. Since aphids
damage tomato crops less than the insecticide-resistant pests do, insecticides should not be used against aphids on tomato crops.
This sort of questions take me around 3 minutes to solve. Please provide any hints to improve timing on solving them.
Cheers