$x$ rounds to $4.7$ when rounded to 1 decimal place. $y$ rounds to $2.3$ when rounded to 1 decimal place. Let $z = x - y$. Which of the following describes exactly the set of possible values of $z$, so that every value in the set is possible and no other value is?

• A$2.3 \le z \le 2.5$
• B$2.3 \le z < 2.5$
• C$2.3 < z < 2.5$
• D$2.35 < z < 2.45$

Choose an answer — or press 1234