Given the following method, which of these method calls is valid?

```
public static void showProduct (int num1, double num2)
{
int product;
product = num1 * (int)num2;
System.out.println("The product is " + product);
}
```

a. showProduct(5.5, 4.0);
b. showProduct(10.0, 4);
c. showProduct(10, 4.5);
d. showProduct(33.0, 55.0);

c. showProduct(10, 4.5);