Which code segment should you use?

You write the following code to implement the CertkillerClass.MyMethod function.
public class CertkillerClass {
public int MyMethod(int arg) {
return arg;
}
}
You need to call the CertkillerClass.MyMethod function dynamically from an unrelated class in your assembly.
Which code segment should you use?

A.
CertKillerClass myClass = new CertKillerClass();
Type t = typeof(CertKillerClass);
MethodInfo m = t.GetMethod(“MyMethod”);
int i = (int)m.Invoke(this, new object[] {1});

B.
CertKillerClass myClass = new CertKillerClass();
Type t = typeof(CertKillerClass);
MethodInfo m = t.GetMethod(“MyMethod”);
int i = (int)m.Invoke(myClass, new object[] {1});

C.
CertKillerClass myClass = new CertKillerClass();
Type t = typeof(CertKillerClass);
MethodInfo m = t.GetMethod(“CertKillerClass.MyMethod”);
int i = (int)m.Invoke(myClass, new object[] {1});

D.
Type t = type.GetType(CertKillerClass);
MethodInfo m = t.GetMethod(“MyMethod”);
int i = (int)m.Invoke(this, new object[] {1});

Explanation:
Use reflection to get MethodInfo object that corresponds to the MyMethod member function.
Call the Invoke() method of MethodInfo