Took me a good 15 seconds to realize what the difference was.
C.) is correct if you have a word that ends with s and you need to make it possessive you use a apostrophe after the s.
Example: You guys' chairs look bad.
Answer is C
This is in Malay and it means Make two word sentences using a combination of descriptive words used descriptors!
Explanation:
ability to do or act; capability of doing or accomplishing something.
The answer is mass communication.