I think its B.) A large contrast between light and dark
You go... how do u not know that... rly.
If you wanted to create a blurred background effect when taking a portrait, then it is a good idea to include more back ground in your picture.
Answer:
You can have a starter be something like a birthday party, work meeting, etc;
Explanation:
Improve is whatever you want it to be. So like make up something and go along as you please. Like a meetin at work, a pizza party, or a stressful test/exam. Have fun with it. Hope that this helps.