PCI and AGP slots have been replaced with PCI-E slot (PCI-Express). There are different types of PCI-E buses:
PCI Express 1x (250 [500] * MB/s)
PCI Express 2x (500 [1000] * MB/s)
PCI Express 4x (1000 [2000] * MB/s)
PCI Express 8x (2000 [4000] * MB/s)
PCI Express 16x (4000 [8000] * MB/s)
<span>PCI Express 32x (8000 [16000] * MB/s)
I hope that's what you meant :)</span>
There is not really a key benifit, but it does help with little things.
Typically, "Del" stands for "delete."
Most times, this key will do different things depending on the type of keyboard/computer you have. For example, on macs, the "delete" key is also the backspace key, so it will delete the last character you typed. However, on most pcs, the "delete" key will delete characters you typed that are in front of your cursor.
B. only accesible over the internet
It would be the last one, because she isn't recording any type of data over what she is doing and she isn't observing it at all. She simply trimmed the stems of a bouquet of flowers. However, the other options insist that they are recording data and observing, like you would do when performing an experiment. I hope this helps! :)