Answer:
B. They are determined to get the phone back to its owner.
The detail from the passage that supports the claim that Lorena, Ana, and Sergio are honest is that they are determined to get the phone back to its owner. This shows that they have a strong sense of responsibility and integrity, and are not interested in keeping something that does not belong to them. The fact that they are actively trying to return the phone to its rightful owner, rather than ignoring it or keeping it for themselves, suggests that they are honest and trustworthy individuals.