An electric heater is connected to the mains supply by means of a fused plug. The current in the heater is $10\ \text{A}$. The cable fitted to the heater is rated at $15\ \text{A}$. The fuses available have ratings of $1\ \text{A}$, $3\ \text{A}$, $5\ \text{A}$ and $13\ \text{A}$. Which fuse is the correct choice?
- A$1\ \text{A}$
- B$3\ \text{A}$
- C$5\ \text{A}$
- D$13\ \text{A}$