public static int[][] readBoard( Scanner sc ) Uses the provided Scanner to read the board and return a 2D integer array with the appropriate values. Input should be 9 rows of values with 9 characters each. These characters will be 1-9 to indicate a fixed number in the starting board, or a - (dash) to indicate an empty location. A value of 0 indicates an empty space in the returned array. Should return null if the board was invalid (contains invalid characters or does not contain enough values.) Example input:

Q-3 a technician is setting up a computer lab. computers on the same subnet need to communicate with eachother peer to peer communication,a. hardware firewallb. proxy serverc. software firewalld. gre tunneling

Which of the following methods could be considered a “best practice” in terms of informing respondents how their answers to an on-line survey about personal information will be protected? respondents are informed that investigators will try to keep their participation confidential; however, confidentiality cannot be assured. respondents are informed that a research assistant will transfer all the research data to a password-protected computer that is not connected to the internet, via a usb flashdrive. the computer is located in a research team member’s office. the investigator uses the informed consent process to explain her institution’s method for guaranteeing absolute confidentiality of research data. the investigator uses the informed consent process to explain how respondent data will be transmitted from the website to his encrypted database without ever recording respondents’ ip addresses, but explains that on the internet confidentiality cannot be absolutely guaranteed.

The three logical operators used to write compound conditions are "and," "or," and "not." a: true b: false