Answer:
C, proprietary software
Explanation:
Proprietary software, also known as non-free software, is computer software for which the software's publisher or another person reserves some rights from licensees to use, modify, share modifications, or share the software. It sometimes includes patent rights.
It helps reveal the flow of execution of your program, including results of in-between evaluations. In other words, you can see what your program is doing, and why it takes the decisions it is taking.
If something unexpected happens, the trace will show you the sequence of events that lead to it.
Answer:
<h3>
<em><u>C</u></em><em><u>.</u></em><em><u> </u></em><em><u> </u></em><em><u>City</u></em><em><u> </u></em><em><u>and</u></em><em><u> </u></em><em><u>state</u></em><em><u> </u></em><em><u>where</u></em><em><u> </u></em><em><u>it</u></em><em><u> </u></em><em><u>was</u></em><em><u> </u></em><em><u>published</u></em></h3>
Explanation:
<h3>#CarryOnLearning</h3>

I believe the answer would be B taking b2 and b3 together and then subtracting b4 from the total number