What was the first united states constitution? mayflower compact, bill of rights of 1689, declaration of independence, articles of confederation

Let's look at the options, starting at the last.  The Mayflower Compact was written by the Pilgrims, the first future Americans.  It was the first framework of government, but it's not a constitution.  (A is wrong.)  The Bill of Rights of 1689 was in England, not the US!  (B is wrong!)  The Declaration of Independence isn't a constitution at all, it's exactly what it sounds like: declaring independence. (C is wrong.)  

The Articles of Confederation was the first constitution that the US government created, though it sufficiently lacked many powers that our present Constitution has. (D is correct!)

Articles of Confederation