LOTS of contextual information here!!
Blank (i) describes the movie, and we're told that "there is nothing quite like this movie" and we are told that it's subtle and puzzling
So, let's see which answer choice meets one or more of these conditions (nothing like it, subtle, puzzling)
A. peculiarity - FITS
B. pellucidity (clearness in meaning) does NOT fit with puzzling and subtle
C. conventionality - does NOT fit with nothing like it
So, A is the best option for this blank.
Blank (ii) describes most other films, and these films are in contrast to the movie the author likes. That is, the word for blank (ii) should be the opposite of nothing like it, subtle and puzzling
D. indirect - No good. We're looking something different from subtle and puzzling
E. assertive - FITS. This is very different from subtle
F. enigmatic - No good. We're looking something different from subtle and puzzling
So, E is the best option for this blank.
Answer: A, E