Delia Ross is an excellent and highly qualified babysitter. She is 15 and has completed the American Red Cross babysitter class. The class teaches students how to care for infants and children. The class prepares students for emergencies including illnesses, injuries, and accidents. Delia is also certified in CPR and basic first aid. She is very smart and responsible. Delia is a straight-A student at Greenville High School. Delia’s teachers say that she always turns her work in on time, pays attention in class, and makes good grades on all of her tests. Other babysitters may say that Delia is not experienced in taking care of young children because she does not have any younger siblings. Although Delia does not have any younger siblings, she has plenty of experience taking care of her younger cousins. She has five cousins that are ages 3 to 10. At family gatherings, Delia has often been responsible for looking after her younger cousins for hours at a time. Delia’s aunts and uncles proclaim her caring nature and mature attitude. They say that Delia has been holding and feeding her baby cousins since she was 10. None of Delia’s younger cousins have ever been hurt while in her care. Delia is also a very fun babysitter. Her cousins say that she plays games, reads stories, and does arts and crafts activities.
Delia charges $10 per hour for one child and an extra $5 per hour for each additional child. Some parents may think that Delia charges too much for her babysitting services. While this may seem like a lot of money, Delia is worth it. Parents will know that their children are safe with Delia. She pays for her own American Red Cross babysitter class, CPR, and basic first aid training each year. Also, Delia brings her own arts and crafts supplies to do activities with the children she babysits. On top of providing safe and fun babysitting, Delia always makes sure that the house is tidied up before the parents come home. Delia’s babysitting clients often comment on how she leaves the house cleaner than it was before she arrived.
Delia Ross is the best babysitter any parent could ask for. She is well trained. Delia is a good student, has a lot of experience caring for her younger cousins, provides fun arts and crafts activities, and leaves the client’s house tidy. Parents should hire Delia for all of their babysitting needs.

How does the author of the passage argue against the opposing claim that Delia charges too much for babysitting?
A. by comparing Delia's prices to the cost of an American Red Cross class
B. by stating the many benefits that Delia offers her babysitting clients
C. by describing Delia's great academic performance in school
D. by telling what her aunts, uncles, and cousins say about her