Strain means to make a great effort
I believe it is C. Try and think about where you would naturally pause, you wouldn't say "Tourists in Mexico *pause* enjoy eating the rich, delicious food."
Answer:
a) knight
b) feature
c) circumstance
d) admire
e) distinctive
f) literacy
g) outfit
h) encourage
i) wise
j)
Explanation:
Hope this helped! If you need further explanation, let me know!
- profparis