The correct answer among all the other choices is "by granting US veterans benefits to attend universities." This is how the GI Bill contributed to the growth of professional and white-collar jobs. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.
I believe the answer is: by granting US veterans benefits to attend universities
United States would most likely spend a large number of their productive years for the dedication in military service, which make them unable to compete in the job market when they came back.
GI Bill help these veterans to obtain additional education, which help their transition to obtain more professional/white collar jobs.
The Boll Weevil was an insect that destroyed crops in Alabama in Georgia. The reason they were effect at different times is because they had different crops and the Boll Weevil migrated at different times.