Answer:
(d) all of the above
Explanation:
This is because, not only is digital video a core technology for digital television, it also happens to be a core technology for video conferencing and video messaging. This could be seen in its application in messaging apps for private discussion of for holding official meetings between employees in virtual conference.
 
        
             
        
        
        
Answer:
 A tablet can have mobile data such as MetroPCS. But the tablet can not make phone calls or texts.
 
        
                    
             
        
        
        
Answer: The Progressive Era was a period of widespread social activism and political reform across the United States that spanned the 1890s to the 1920s. 
Explanation:
 
        
                    
             
        
        
        
HTML: Hyper Text Markup Language.
HTML is the markup language used for defining the structure, and very basics of a web page - one wouldn't be possible without this language!
HTML is combined with CSS (Cascading Style Sheet) to improve visuals, and combined with a language such as Javascript to add functionality and interaction with the web page.