The answer is A as it is stating an opposite claim.
C- it joins nouns, verbs, adjectives, adverbs, phrases, or sentences
Abigail Williams and John Proctor are ex-lovers. We discover in the first act of The Crucible by Arthur Miller that the two of them had an affair. Abigail was the Proctor's servant girl, and it was, at least according to her, a very intense affair.
The second one because Every aspect of global communication is influenced by cultural differences.
lol I'm pretty sure I annoy my friends but ok