This is really an opinion thing. But say Jay Gatsby, because he knows how to have a fun time.
Answer:
The answer is likely to be 1, 2 or 3.
3 is the most fitting answer.
Answer: To get to my house, you will need to follow my directions. You should be able to get there without any trouble.
When you said <em>in</em>, I think you meant able. Try that instead of 'in'
Answer:
geologist are the people who studies The Earth