I think it is B because the + sign is saying that there is more than just guitars
Hope this is helpful :D
        
             
        
        
        
Answer:
False.
Explanation:
The problem identification document contains the description  of the problems that are restricting the goals and objectives of the project from being achieved.
It does not guide in decision making of the software developers.It helps them to see where the problem is not in decision making.
Hence the answer to this question is False.
 
        
             
        
        
        
Answer:
The sonar operator looks at the display a forms an internal representation of the strength of the evidence that a submarine is present. If this exceeds an internal, subjective threshold,the sonar operator tells the captain that a submarine is present.
 
        
             
        
        
        
Answer:
By pressing key ALT and F4 to close a window application.
Explanation:
<em>Closing Microsoft application comes in different ways such as:
</em>
<em>
a. Pressing ALT and F4 to close an active window application.
</em>
<em>b. Press the X button at the upper right of the screen.
</em>
<em>
If you are using a MAC or apple computer with Windows emulator, you can simply press on COMMAND key and W key to close an active window application.</em>