What are the answers to questions 8-13 about computer science concepts?

Here are the answers to the multiple-choice questions:

8. The logic gate that obtains a similar operation as the sum in the half adder is the XOR gate. The sum output of a half adder is $A \oplus B$. The correct answer is A.

9. An OMR (Optical Mark Recognition) device is used to input completed forms with marked bubbles or boxes, such as multi-choice questionnaires. The correct answer is B.

10. For repetitive tasks and as a replacement for humans in hostile environments, a robot is the most suitable. The correct answer is A.

11. Retrieving someone else's program assignment, even from the recycle bin, and using it as one's own is considered both illegal and unethical in an academic context. It constitutes plagiarism and academic dishonesty. The correct answer is C.

12. Joe committed a computer crime because he used computing skills to access an account he shouldn't. Unauthorized access to an online bank account, regardless of intent, is a computer crime. The correct answer is C.

13. Among the given options, the negative impact of computer technology is that more people totally rely on computers when doing their works. This over-reliance can lead to vulnerabilities, skill degradation, and significant disruption if systems fail. The correct answer is C.