Sanele made a valid will in $2017$ but decided a few months later that he wanted to revoke the will. Which of the following methods would NOT constitute a valid revocation of the will?

Select one:

a$.$

Sanele drew a line through all the pages of the will.

b$.$

Sanele made a new will contrary to the provisions of the first will.

c$.$

Sanele declared before witnesses that he was revoking his will.

d$.$

Sanele made a new will in which he included a clause revoking the previous will.