Instructions Full Game: These are multiple-choice quizzes with four possible answer choices that include all questions in a given set.     
On the 2020 Fortune 500 list, what company, based in Irving, Texas, and headed by Brian S. Tyler, came in at position #8?
Berkshire Hathaway (BRK.A)
McKesson (MCK)
Fannie Mae (FNMA)
Walmart (WMT)