Can you explain the difference between "import" (e.g. import os) and "from ... import *"?

can we go over question 2. I know that a is a valid answer but I feel like d would also be a valid so I am a little confused.

In the people app, could we fetch all of the people (people.get_people(conn)) on the function to execute before the first request? Doing something like that could make sense for an app that works with some type of information (such as all people) in many places. 

Could you go over question 5 (what happens when you use the .execute() method on a cursor object)?