Answer:
G. minimize possible negative effects of visitors on the penguin habitat
D. If they are actually working in harmony, they should not be hiding any stress from eachother
"I'm here to see my granddaughter," she said to the woman standing next to her in line. The woman turned away.
Answer:
At the end of the story, <em>Monsters Are Due on Maple Street</em>, the aliens are having a conversation about how they are planning to take over the world, but are just using Maple Street as an experiment.