it uses the words and, but
Please don't write "which of the sentences below", if you don't provide the sentences. That just wastes everybody's time.
syntax or grammar
No, it is not a conjunction. It is a verb, and in some uses a noun.
The interview contains run-on sentences and "filler" words while the preface uses complete sentences.
Without the sentences provided, I can't determine which sentence uses commas correctly.
haro
Look for the types of words the author uses. Also see what the sentences are like: long and educated or short and basic.
8------>
... convenience sample.
Yes, The Hunger Games uses compound sentences.
Its context