Problem: People from two villages ate lots of salt. People from Salt village used regular salt, while people from Sand village people used iodized salt in their diets, after talking to specialists. Which village had fewer people with enhanced development?

A: Salt

Problem: Two neighboring police Departments took different approaches to fighting crime, Greenville P.D. did not invest in DNA testing, improved forensics, and information technology, while Grayville took extensive measures of that nature. Which P.D. took a more comprehensive approach in fighting crime?

A: Grayville

Problem: David is an environmental scientist. He needed to find causes of wildfires and suggest preventive measures. First, he visited a dense forest. He marked it as location A. Then he visited a grassland, which he marked as location B. After that, he visited a location where he did not find any sign of drought. He marked it as time A. He then visited the same location a year later, and found that the place was facing a severe drought. He marked it as time B. Would location B be less or more susceptible to wildfires than location A?

A: more

Problem: In a greenhouse, a botanist has just finished planting two of the same kind of plant. Plant A was placed in a pot of standard soil, and plant B was planted in some serpentine soil. The botanist is planning on taking care of both plants equally so he can see which type of soil is better for growing a plant. Which plant's soil has more nutrients in it?

A:
Plant A