The answer is B: Spelling and Grammar
Nick knows that it is important to check for spelling and grammar mistakes before distributing his content. Fortunately, Microsoft Word makes it easier to spell check his work all at once by running the spelling and grammar checker. To do this on his Word document, he is required to click the Review tab and then click the Spelling or Spelling & Grammar button. If Word finds any mistakes, a dialog box will pop up with an option to correct.
 
        
                    
             
        
        
        
Answer: shared
Explanation:
Shared media simply refers to the contents that a particular brand posts to social media platforms. 
In such cases, the site gives room for the users to join conversations regarding the post being shared by the brand. It is typically cost effective and used by several organizations.
 
        
             
        
        
        
Answer:
Because reusing the old passwords possess security threats.
Explanation:
A password can be defined as a string of characters or words or phrases that are used to authenticate the identity of the user. It is also known as passcode and should be kept confidential. A password is used to access constricted systems, applications, etc. 
A password or passcode is usually composed of alphabets, numbers, symbols, characters, alphanumeric, or a combination of these.
<u>In the given case, Judy was not able to change her passcode to the previous one because reusing old passwords is prohibited in any sites or systems. A system denies the user to reuse the old passwords for various reasons but most importantly due to security reasons. Though it is said that old passwords can be used after 100 times but seldom someone changes a password that much. All systems care for the security of their users thus they deny reusing old passcodes.</u>