You can press on the clip icon, which means drop a file. Then if you are on a computer, you can access to pictures library to select what you want to put in your ? and if your on your IPad or mobile device, press it two times and then it says "take picture" or "get from picture library' or something like that. Select the pictures you want, and post your question. Voila!
Answer:
IP address and MAC address
Explanation: The IP address tells the server what network to send the information to, the MAC address tells the local network what device to send it to.
The answer is 6.5 inches.
I think it's D because it would be in recycle