Answer :
The action Thomas Paine wants his readers to take after reading The Crisis is: join the cause to fight for American independence from Great Britain.
I believe the answer is: A.) he wants them to fight for liberty
Through his writing, paine described how the British government has unfairly treated the colonists by imposing more tax rate that the colonist could afford to. His purpose is to gain support so many more people want to join the revolutionary army for the fight of liberty.