How Do Some Orchids "Cheat" in Their Relationship with Their

How do some orchids "cheat" in their relationship with their pollinators?

A) They don't always give out nectar, but they still gets pollinated.
B) They don't really need the pollinator to get pollinated.
C) They mimic female bees or wasps and so the male wastes sperm and doesn't get food, but the orchid gets pollinated.
D) They don't always give out pollen to the pollinators.
E) Wasps or bees get mates but the orchid gets nothing.