In bidding, there is not always black and white.
Sometimes several bids can be "right" and it will depend on the whole deal (and maybe on your partner's and opponents' style) which one turns out to be the most sucessful one. Some of today's questions offer more than one possible bids; I always give the points for the one that I prefer.
If you don't agree, don't get upset but be sure you treat those situations the same way as your partner.