Now that the Government is trying to protect its citizen from human trafficking, why blame them?

What they asked you were the basic requirements for a "BUSINESS VISA" holder. You should have done your research before going on your travel.
I also went here on a business visa but had no problems because I had all the documents needed to show the officer at the immigration counter.
The answers to the questions are found on the required sponsor invitation letter. If you were not able to answer those questions then really you either did not read your invitation letter or it is a bogus letter.