I've just had a look at the consultation responses on the Breckland website. There are quite a few showing location A (Land North of Attleborough/Besthorpe) as the preferred location but if you read the comments they clearly object to location A being used. I suspect that if you don't select an option it defaults to option A.
Breckland Council also seems to be making a judgement on whether you support or object to the proposal based on the comments. Again many of these are clearly inaccurate.
If you made your comments online please check and contact Breckland Council to get them to accurately record your views.