Answer:
Is there more to the question? But I have had this question already and the answer is B)
Answer: Scope resolution operator(::)
Explanation: A member function and the constructor can be called within the function easily but for the execution of the these components outside the class , a special operator is required to call the functions. The scope resolution operator(::) preceding with the name of class is thus used for defining of the function outside class.This operator maintains the cope of the function and constructor outside the class.
Do you mean with the computer
It is often better to check your connection and make sure it is secure. Sometimes restarting the computer also works. Hope this helped!
-TTL