Could you please show the options ?
Explanation:
Because McDonald's is the second largest chain of fast food around the world. There are around 36,000 outlets worldwide. People are so in love with McDonald's and so crazy about it that people started to eat as their meal everyday. So Morgan Spurlock wanted to show what could happen if kept living on McDonald's.
Answer:
Definitely formal English as formal English is used in formal settings. Both the examples you gave are formal settings.
Answer:
You should be a comedian! (If that's what you were wondering.)