What was agreed to under pinckney's treaty? HELP ASAP

What is one result of the supreme courts decision in the mccullough v maryland case

Plz me in 1756 george washington was sent on a mission to, a. build a fort at the point where the allegheny and monogahela rivers form the ohio river. b. attack the french at fort duquesne. c. attack the french at fort neccessity. d. deliver a message to the french demanding that they leave the ohio valley.

What was significant about the 1896 supreme court rulling in plessy v. ferguson