Big mistake in my previous analysis.
Entire pattern completed. Not just (c)
charts below.
3 viable options for wave (D) down.
1. Expanding triangle with large B-wave
2. Reverse alternation expanding triangle (large D-wave)
3. Elongated zigzag with 5th wave extended.
note: the running w-x-y shown ends E of (C) just like in the 2 above charts