Belén and a friend are debating how often a car's oil needs to be changed. Belén asserts that the correct answer is every 5,000 miles because this is what her mother always told her. Belén's friend Patricia claims that the mileage varies based on the car, and to prove her point she shows Belén the user manual for her car.
What does Patricia’s argument have that Belén's does not?
A.)
Expertise
B.)
Credibility
C.)
Justification
D.)
A scholarly source