Task: Instance Class Understanding (ontology: Arts_Media_Entertainment/Propp)

Which of the following classes does '"Impossible task: filling a grain-bin through the hole in the bottom."' belong to? Context: "Terminal motif H1023.2.3"

A. "Task: hatching boiled eggs."
B. "Task: straightening a curly hair."
C. "Task: carrying water in a sieve."
D. "Attention drawn by magic objects: recognition follows."

Answer: "Task: carrying water in a sieve."