Explain:
A. Another + N (singular): a thing/another person
B. Little + N (uncountable): very few
C. Other + N (plural): other things/people
D. Others: other things/people
Translated:
Other symptoms include using the Internet to escape problems and lying to family or friends about time spent on the Internet. (Other symptoms include using the Internet to avoid problems and lying to family or friends about Internet time.)
→ Choose the answer C