Muddiest Point Comment!

There is only two types of blood that involves having A in it and so it did not specify hybrid so it referred to just Type A rather than it being a hybrid and for your second question you had to put in HH which represented it was dominant and the disease was present. It also stated that the other parent did not have the disease which was presented as Hh because both letters would have to be HH to have the disease and if you applied that to a punnet square and checked out the offspring you can see how it is shown or expressed.