What is the last step in the process of getting a bill passed into law under normal circumstances?

The correct answer is D. Sending it to the president.

After a bill has been approved by both houses of Congress (the House of Representatives and the Senate), the final step under normal circumstances is to send it to the President. The President can then choose to sign the bill into law, veto it, or take no action. If the bill is vetoed, Congress may still override the veto with a two-thirds vote in both houses.