but either the Red Sox or Yankees will win the World Series

\"_____________, but either the Red Sox or Yankees will win the World Series. So we should conclude that the Red Sox will win the World Series.\" The missing premise in the valid argument above is: Select one: a. The Red Sox have the best team b. The Yankees do not have the best team c. The Red Sox will win the World Series d. The Yankees will not win the World Series

Solution

a. The Red Sox have the best team

as   The Red Sox have the best team it will have the best probability of winning the world series