Problem: David is a chemist, working for a large pharmaceutical company. He was contemplating on a project that would help perform chemical reactions more efficiently. For that, he conducted two chemical reaction tests, test A and test B. In test A he used enzymes, but in test B he didn't use any enzymes. He now needs to evaluate the pros and cons of each of the tests. Which test would require longer time, test A or test B?

A: test B
Problem: Given the question: Two colleagues gave blood for an emergency. Ned got infected with HIV because they re-used a needle. His friend Nate was not infected. Which colleague didn't have a virus that originated in sub-Saharan Africa?
++++++++++++++++++++++++++++++++
The answer is:
Nate
input question: Scientists studied two groups of plants. Group F had plants with flowers, group W had plants that fertilize over wind- spread pollen. Flowering plants were more efficient. Which group of plants has more brightly colored petals????
output answer: Group F
Two coastal cities were affected by a cat 5 Hurricane. Red city took the full impact, but Purple city, situated 40 miles inland, avoided the brunt of the damage. Which city experienced less damage from the storm surge?
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Answer: Purple
Q: Ben and Jerry studied agricultural sciences. Ben was specialized in pedology and pedogenesis, while Jerry specialized in entomology and phytopathology. Which person learned less about soil formation?
A: Jerry
[Q]: Recently a large amount of factories have been built in Illinois using fossil fuels as their main energy source. In Indiana however, many of their factories have been shut down and replaced by parks with many plants and trees. Given illinois decides to shut down half of the fossil fuel burning factories will carbon dioxide levels increase or decrease?
****
[A]:
decrease