Answer: B. Lisa's dad, one of the firefighters in town, was praised as a hero for rescuing a young boy.
Explanation;
Option A is not correct because the subject "Lisa's dad" is singular, but the verb "have been" is plural.
Option C is not correct because the verb part "are praised" is not correct since "are" is plural but the subject "Lisa's dad" is singular.
Option D is not correct because the verb "were praised" is plural and cannot match with the singular subject "Lisa's dad".
Therefore, option B is the only correct option left.
