a. Yes
b. No, not thematic, no, not correct letters. I think you have got the CRI? answer in the wrong place - it's vertical, the thematic is the horizontal. The intersection has probably muddled things...
After the mess I made of the last thematic I'm probably the last person that should be giving hints but ....
A from the clue + 3 letter "study" + single letter "zero" + 2 letter "papers" - I did think this should be plural but maybe the "about" makes the singular okay.