给定一个简单的类定义如下，（ ）语句在类的外部正确地创建了一个 Circle 对象并调用了 getArea 函数？
class Circle {
private:
double radius;
public:
Circle(double r) : radius(r) {}
double getArea() {
return 3.14 * radius * radius;
}
};
- A. ```cpp
Circle c = Circle(5.0); c.getArea(c);
- **B.** ```cpp
Circle c(5.0); getArea(c);
- C. ```cpp
Circle c = new Circle(5.0); c.getArea();
- **D.** ```cpp
Circle c(5.0); c.getArea();