Context: Jen is deciding whether to plant sunflowers or a birch tree in her backyard. She wants to make her backyard more beautiful. But she also wants to leave space for doing fun things.
Suppose Jen decides to plant the birch tree. Which result would be a cost?
A. Jen will get to look at the birch tree. She thinks it will look more beautiful than the sunflowers would have looked.
B. The birch tree will use up more space than the sunflowers would have used up.
From the given choices, pick the correct answer and respond by indicating the letter of the correct option.

B