Where do I chop for clone A, B, C, D... (pic inside)

Lol, tried to make this as simple as possible. Which should I cut for clones so that it will hurt the plant the least. Thinking of taking 1 or 2 clones from each of my strong plants.
Should I wait till its bigger? It's got like 3-4 nodes on most of the plants. They are all roughly 15 days old.

that plant is way to small to clone you cut off the branches or the top off for cloning. and it should have interlocking nodes and 5 of them to make a good clone google it or look on you tube tones of vids that would help

When your ready to go, take the bottom the sites. The sites closest to the roots have the most rooting hormones and get the least amount of light.