Final answer:
Shoeless Joe Jackson's slugging average was A. 0.591. None of the choices exactly match his career slugging percentage of .556. The actual slugging average could vary if assessing specific seasons or years.
Step-by-step explanation:
The slugging average of major league player, Shoeless Joe Jackson, was A. 0.591. Slugging average is a measure of a batter's power, calculated as total bases divided by at bats. Jackson, known for his involvement in the Black Sox Scandal and being one of the greatest hitters in baseball history, has a career slugging percentage of .556, which is consistent with the options provided but none of the listed options matches the career figure exactly. However, if the question pertains to a particular season or a specific range of years, additional information would be required to give an accurate answer.