Option 1 states that the First Continental Congress rejected a plan for a colonial union under British authority. This means that the Congress did not agree to the idea of forming a united colonial government under British rule.

Option 2 states that the Congress drew up a statement of grievances. This means that the Congress created a document listing their complaints and concerns against British policies and actions.

Option 3 states that the Congress agreed upon a scheme to stop trade between the Colonies and England. This means that the Congress decided to implement a plan to halt commercial activities between the American colonies and Great Britain as a way to protest British policies and assert their independence.

The correct answer is option 2, which states that the Congress only drew up a statement of grievances. Therefore, options 1 and 3, which mention decisions that were supposedly taken by the Congress, are incorrect.