Problem: Two groups of students made some experiments for school. Group A used brewer's yeast on flower and tried to make bread. and Group B brewed beer with brewer's yeast, then baked bread with baker's yeast. Which group caused the bread to rise more?

A: Group B

Problem: Two six graders learned about the lives of animals. Lori learned more about fish, while Dan learned more about mammals. Which student learned less about a network of very small blood vessels?

A: Lori

Problem: Air pollution is a big problem in large industrial cities. New York has its share or air pollution. John is a doctor who works for a New York hospital. Today, he is seeing two patients, patient A and patient B. His diagnosis revealed that patient A has pulmonary fibrosis, but patient B does not have pulmonary fibrosis. In which patient John found thickening of lung walls, patient A or patient B?

A: patient A

Problem: Two men, Sam and Frodo, go into the doctor's office to have the exact same procedure done to one of their arms. They won't need to be knocked out for this, but they will be given anesthetic to help with the pain. After the nurse administers the anesthetic to both men, the ions in Sam's arm continue moving across the membrane, but the ions in Frodo's arm stop moving. The doctor then comes in to begin the procedure. Who will experience pain when the doctor starts the procedure?

A:
Sam