Problem: Ben and Andy were two old friends. They both have high levels of cholesterol. Ben was prescribed cholesterol medication, while Andy didn't go to the doctor because he was careless. Which friend took a drug that changed the levels of HMG-CoA reductase?

A: Ben

Problem: Factories around the world produce lots of CFCs which deplete the ozone layer. One year a large number of these factories decided they would implement efforts to reduce the amount of CFCs they release into the atmosphere. As a result the depletion of the ozone layer greatly decreased. However, the companies realized that this was hurting profits too much and reverted their decision. As a result the ozone layer began to rapidly deplete again. Given that half of the companies decide to reduce the amount of CFCs they release , will ozone depletion increase or decrease?

A: decrease

Problem: John is a physician in the local hospital. Today, he is seeing two patients, patient A and patient B. John determines that patient A is obese, and patient B is not obese. He needs to prescribe medicine according to his findings. Which patient would more likely consume more food than needed, patient A or patient B?

A: patient A

Problem: Bird city had may economic ties with Pine city. Pine city was located in the mountains, and was inhabited by nature lovers and people that protected the environment. Bird city was situated on the banks of a large river flowing into the sea. They relied mostly on conventional agriculture and used fertilizer for their crops. Which city released more human waste into the ocean?

A:
Bird