The graph illustrates the way the internal energy of $1.0\ \text{kg}$ of a metal varies with temperature. What is the rise in internal energy of a block made of the same metal with mass $0.25\ \text{kg}$ when its temperature increases from $40\,^{\circ}\text{C}$ to $50\,^{\circ}\text{C}$?
- A$30\ \text{J}$
- B$300\ \text{J}$
- C$750\ \text{J}$
- D$1200\ \text{J}$