Http://studyspanish.com/grammar/lessons/adverbs
A is the answer. Adding -amente makes it an adverb
The word which complete the sentence is caminaba.
Yo caminaba por el supermercado cuando me llamó mi madre.
<span>a humorous movie
an international film festival
a short film filming class
a discussion with many famous directors</span>
i think it is a or e because i had the same question and i just clicked a and i got it right but if not sorry
