It’s d for sure trust me on this one
<span>The term rhetoric refers to B. language used to have a certain effect on readers and listeners. Rhetoric is the appeal to readers' senses and emotions, through the use of logic, persuasion, or emotional appeal. Writers will use certain language so as to make an impression on readers, to evoke a certain reaction in them. </span>
:Life for me ain't been no crystal stair" because you life isn't literally a stair case for anyone. The speaker is simply comparing his/her life to something else that it couldn't be.