Which word in the sentence is a proper adjective?

in texas, we dipped crunchy chips in spicy mexican salsa.

a.
mexican

b.
crunchy

c.
texas

d.
spicy

Insert comma today we went to the store to the post office and to the park

Why didn't van gogh knock on breton's door? it seemed imposing and a bit scary. it looked alarmingly middle-class. he couldn't find the door. he saw a book that he liked instead.

What is the main problem that kyle faces at beginning of the story