I just recently got the same Visas as you have and, if I remember correctly, had to go through the ESTA program before I filled out the application for the US C1/D and B1/B2.
Few weeks I went as a tourist through BOS and filled in the form as I would be arriving as ESTA. However, the border agent sent me back to fill out the form according to the B1/2 as it superseded the ESTA visa waiver.