According to Chapter $2$ "Critical Reading: Getting Started", what is the "first and last" rule?

The rule that states you should start your first body paragraph with the word "First," and your last body paragraph with the word "Last,".

The rule that states you should first critically think about your conclusion and then you should, at last, build your argument.

The rule that states you should first critically think about your argument and then you should, at last, come to a conclusion about your argument.

The rule that states you should place important material at the beginnings and endings of texts.