In the research study by coulter-kern et al. (2013), the researchers found that:

The goal of the research study by Coulter-Kern et.al (2103) was to answer the question: Does participating in a service learning project increase career knowledge for college students? I
I the research study, the researchers found that college students who participated in service-learning experiences showed significantly more understanding of career decision-making than students who did not participate. 

Ibelieve the answer is the first 1