Hi...erm i seem to remember the feedback was a little vague for these two questions. The answer to the first question is that i read somewhere that it could be type specific but the examiner wants A.
However for the second question the answer is also A....1 and 2 are definitely right....3 however is rubbish and how can that be an advantage!!! Which cuts out B C and D. 4 is definitely an advantage and 5 is a sort of non-entity....niether disad or ad.
hope this helps
Tom