Answer:
c. SSL Certificate
Explanation:
The full form of SSL is Secure Sockets Layer. It is the standard security technology which establishes the encrypted link between a client and the server—typically a web server (which is the website) and the browser, or the mail server along with a mail client (for e.g., Outlook).
In the context, in order to develop an SSL connection, an SSL Certificate is required by the Web server.
A constructor in object-oriented programming is a special
method of a class or structure that initializes an object of that type.
Basically, it resembles an instance method that usually has the same name as
the class. In simple terms, it is a subroutine called to create an object.
There really is no getting it back, if it is from a virus, then you need to buy a new computer. If it is something internal, depending on what type of computer you have it might just be best to buy a new one. Hope this helps :-)
I believe the first three. 1 and 2 are safety precautions. 3 can help someone remember what the file is. For number 4, the computer will typically do that on its own but not as the exact file name. Usually by right clicking and looking under info it will show the size of the file.