Answer:
It is ironic because he has a positive outlook on him not making the team.
The answer is:
b to convince readers that Britain has treated the colonists unfairly.
In the excerpt from the Declaration of Independence, the author mentions how Britain has has unjust methods. First, he acknowledges British "attempts by their legislature," usurpation, and the fact that the English government has has not listened to the colonies' claim for justice, even though Americans are their descendants.
Either add the passage with the question so we know what you are referring to or do not post questions like these. Not everybody has read what you have. This question is completely useless and unanswerable without the story to go off of.