The last answer sets the most formal tone; "Hello! I was very pleased to meet you at the party last week." the rest are very casual.
Answer:
Life is going to be rough sometimes, but that does not mean you should stop trying or give up.
Explanation:
A MOOC is a massive open online courses. Believing the hype is something I cannot answer for you. It is an opinion, and it is yours to answer.
renewable , hydroponics, the sun the wind the water
A or B because you dont want to spend all of your time prewriting
