Answer:
a. Kantianism
Explanation:
Kantianism -
This theory was given by Immanuel Kant.
According to this theory ,
Good deeds and duty are the crucial elements in order to determine the action which need to be taken .
Any activity is considered to be good , only if it is morally correct .
Hence , from the question , spanking children is not a good activity and it not accepted ethically .
Hence , in the given scenario Kantianism is applicable .