单项选择题 A customer has a wireless router installed in their home office. The customer is having issues with signal strength at the opposite end of the house. Which of the following is the BEST option to increase the signal strength?（）

单项选择题 A program is crashing and causing the computer to lockup. Which of the following is the BESTlocation for a technician to check for further information about the cause of the crash?（）

单项选择题 A second optical drive has been added to the computer and needs to be referenced as the R: drive by the Microsoft Windows operating system. Which of the following places in Microsoft Windows will BEST accomplish this task?（）