I would say A) call to action (roughly 90% sure lol)
Flooding is the main cause
Answer:
B; to indicate that the OED's editors have been studying the way people use words informally online.
Explanation:
Monitor means to watch and OED can add words to their dictionary more commonly used words such as ¨lol¨. Very interesting thing to study on twitter though.
I believe the answer is "Because he got new pants"