Which of the Following Might Be Considered Corporal Punishment

Which of the following might be considered corporal punishment?

A) A parent forces their child to wash all the dirty windows, which requires using a ladder that may be unsafe.
B) A parent spanks their child three times, over the pants as punishment for running away, no visible marks are left.
C) A parent uses a switch to punish the child for not turning off the television when asked, marks are left on the child's bottom.
D) A child is put in a time-out for so long, the child wets his pants.