Ithink the answer would have to be (b) ( i do not have my AIP with me) because the flight is only going 5NM and not outside the 10NM it will be exempt from "general requirements". The flight could go out to 10NM and it would be okay, any where after 10NM it wouldnt. (d) is incorrect because the answer states that the flight only originates from ADIZ aerodrome and we can not be sure if it will be exempt from the general requirements.
Hope this helps a bit
