ICOT –
a – I believe your missing a comma and quotations (Note that I’m no Professor of English.) My answer is:
I said that, “that ‘that’ that that man wrote should have been underlined.”
b – correct
c – correct (a volcano)
d – meaning it has 3 consecutive sets of two letters
BTW the “Brain Wave CD” puzzle, I’m still unsure which of Feivel’s page 1 puzzle you are comparing it to, but if your referring to Feivel’s coin puzzle on page 1, this is different (and not the answer your gave in your last response – nor does the response requires any luck.) Either way, I believe this is different.