Chess Opening Theory/1. d4/1...d5/2. c4/2...c6/3. Nc3/3...dxc4/4. e3/4...b5/5. Nxb5/5...cxb5/6. Qf3/6...Qc7/7. Qxa8/7...Bb7

7...Bb7
This is the obvious move and takes away the entire long diagonal from the queen. However, it does seem a bit odd as you are giving away another pawn, thus leaving you down an exchange and a pawn. As said last page, 7...Nc6 loses.