We have a case of adaptability. Natural selection influenced by the environment selected which plant would do the best, In this case, A has adapted better than B.
Is A because it’s not a prediction it’s proven and not explaining anything nor is it a claim.
The roots will grow toward the ground despite being planted upside down due to gravity. Due to gravity, the roots will turn and grow towards the ground, following gravity's pull. So, I believe D?
I think its B.....hope it helps