Question 1
Answer: A
Fairly self-explanatory. The "all of the above" option should never be dismissed outright, indeed, it is probably in the final two in this one!
Question 2
Answer: E
Option C does not really make sense and D is the opposite of the truth. A and B are more difficult to remove, particularly B where one may be able to argue that there is a very tangential inference. The best solution is, however, that there is no real opinion given.
Question 3
Answer: E
Option A is not a view given in the text, the same goes for C. Option D is inaccurate. Option B however is more convincing, but the reason we can also reject this is due to the fact that the author does say that it is difficult to make competitive (albeit, they do not say that it is impossible to) and E is more accurate in any event (Grand Logic).