Part b: which detail from the text best supports the answer to part a?

a
“and even though the recent recession was difficult for everyone, the current population survey indicates that in 2011, twice as many young adults without college degrees were unemployed as young college graduates.” ( paragraph 3)
b
“the average growth observed in our study is half of what was observed when growth on similar measures was assessed in earlier decades.” ( paragraph 14)
c
“in addition to failing to facilitate the development of general collegiate skills for many students, colleges often do not, according to our research, provide adequate institutional support towards apprenticeships, internships, mentoring opportunities and job placement services.” ( paragraph 19)
d
“the number of clubs and student organizations on any four-year campus is astounding, encouraging a high level of participation in a range of local and global issues.” ( paragraph 23)