Thomas's Foot Began to Swell After He Was Stung by a Scorpion.Thomas

Thomas's foot began to swell after he was stung by a scorpion.Thomas' friend said his mom had an old,trusted herbal poultice remedy that would absorb the venom from the foot,reduce the swelling,and heal the foot.Thomas allowed his friend to place the herbal poultice on his foot before going to bed that night,and the swelling was gone in the morning.Which of the following can be concluded about the herbal poultice remedy?

A) The poultice definitely worked because the swelling went down.
B) The poultice definitely did not cause the swelling to go down.
C) It is very likely that the poultice caused the swelling to go down.
D) There is not anything that can be concluded about the effectiveness of the poultice remedy.