Which Was NOT an Observation Made in the Initial Experiments

Which was NOT an observation made in the initial experiments that revealed effects of auxin signaling?

A) grass seedlings exposed to overhead light bent towards the darkest region of their environment
B) grass seedlings whose blade tips were removed could not exhibit movement or bending
C) grass seedlings exposed to laterally-placed light bent towards the light source
D) grass seedlings tips and bases behaved differently in response to light stimulus