To determine the truth value of the third statement based on the given information, let's analyze each statement:
1) Blueberries cost more than strawberries.
2) Blueberries cost less than raspberries.
3) Raspberries cost more than both strawberries and blueberries.
From statement 1, we know that blueberries are more expensive than strawberries.
From statement 2, we know that blueberries are less expensive than raspberries.
Combining these two statements, we can conclude that strawberries are less expensive than blueberries, and blueberries are less expensive than raspberries. Therefore, it is logical to infer that raspberries are more expensive than both strawberries and blueberries.
Hence, the third statement is true.
Therefore, the correct answer is A) True.