Problem: Two bakeries were famous in town for their angel food cakes. Tom's was a small bakery with various small ovens, took small orders and did some catering. Bill's bakery was large and produced angel food cake commercially, in vast quantities. Which bakery used a small deck oven to bake angel food cakes?

A: Tom's

Problem: Two teams of runners were training for a 10k. Team Y jogged early in the morning when the weather was cool. Team X started their training in the heat so many team members had problems sweating. Which team had more people that experienced fatigue?

A: Team X

Problem: Two sisters named Mary and Ann went in for a blood test and found out that Mary had sickle cell anemia. Ann was normal. Which sister had a disease that causes the red blood cells to have a sickle shape?

A: Mary

Problem: City D's mayor wants to invite more businesses in the city. Three firms, firm A, firm B, and firm C, took advantage of this opportunity. Firm A does not require large initial costs, but firm B and firm C require large initial costs. Firm B managed to increase its market share, but firm C failed to increase its market share. Which firm would most likely not be able to achieve economies of scale, firm A or firm B?

A:
firm A