Final answer:
Approximately 10-15% of U.S. jobs are retail jobs as of 2019.
Step-by-step explanation:
According to the National Employment Law Project, during the Great Recession, 60% of job losses were in medium-wage occupations, and most of them were replaced with lower-wage jobs in the service, retail, and food industries. This data suggests that a significant percentage of U.S. jobs are retail jobs. Although the exact percentage of retail jobs in 2019 is not provided in the given information, it is reasonable to assume that the percentage falls within the range of 10-15% given in the options (B. 10-15%).