Ballpark figure in a rush, with no time (or interest, "lol") to calculate it, I would GUESS that a low cross wind component from the left of 138 degrees with a 20 knot headwind would give you C.
A is from the wrong side, D would be a tailwind.
To get a ° - on a desktop keyboard, hold down the ALT key and hit the numbers 0176 on the number keypad.
No idea why it only works for me on a number pad, not on the top row nor on a laptop.
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