Which of the following will unset a token named my_token?

The correct answer is B, because the element will unset a token named my_token. The element is used to remove the value of a token based on a user interaction, such as a click or a change. The token attribute specifies the name of the token to be unset. The other options are incorrect because they will not unset a token named my_token. The myt​oken element is invalid, because the token name should not be enclosed in dollar signs. The false and disabled elements will not unset the token, but set its value to false or disabled, respectively.