Which sentence is appropriate in a letter to a friend but not in a formal report?

Responses
A Brisbane is located about ten hours north of Sydney, Australia. Brisbane is located about ten hours north of Sydney, Australia.
B It's a really cool place because it's right on the coast near the beach.It's a really cool place because it's right on the coast near the beach.
C Brisbane is a popular tourist destination because it is located on the coast.Brisbane is a popular tourist destination because it is located on the coast.
D Most Americans fly into Sydney and then take a connection from Sydney to Brisbane.

B. It's a really cool place because it's right on the coast near the beach.

This sentence is more appropriate in a letter to a friend due to the informal language ("it's a really cool place"). Formal reports typically require more objective and professional language, avoiding subjective terms like "cool." The other options are more neutral and could fit in either a formal report or an informal letter depending on the context and tone.