Answer:
Option D is best modeled with a division expression
Step-by-step explanation:
A) How much does it cost to buy 3 and 1/2 pounds of apples at $2 per pound?
Cost of 1 pound = $2
Cost of 3 and 1/2 pounds = 
B) B. How many apples are needed for 2 pies if the recipe uses 3 and 1/2 apples per pie?
1 pie requires 3.5 apples
So, 2 pies requires apples = 
C) How many more apples are needed if a recipe uses 3 and 1/2 apples and you only have 2 apples?
Recipe requires 3.5 apples
You have 2 apples
More apples required = 3.5 - 2
D) . How many apples are in each pie if a total of 3 and 1/2 apples were used to bake 2 pies?
Apples required in 2 pies = 3.5
Apples required in 1 pie = 
Hence Option D is best modeled with a division expression