Explanation: Pasted charts are linked by default unless you click a different paste option. A linked chart is updated in your PowerPoint presentation if there are changes to the source spreadsheet. This is useful if you want your presentation to reflect the most current chart data from your Excel spreadsheet.
Answer:(c) abstract class A { abstract void unfinished(); }
Explanation:
A legal abstract class must have the keyword abstract before the class and an abstract class has abstract functions with the keyword abstract written and a void as the return type.