Option B, Down
Mom has to descend the basement stairs.
You can get rid of <em>down</em>, because the word <em>descend</em> means to go down.
Juliet is greeted with a kiss from Paris, which she isn't pleased about, and whips out the dagger and threatens to kill herself as soon as he leaves.
The purpose of an introduction in a paragraph is to introduce the subject (of the artical, text,essay,ect...) and grab the reader's attention (on the topic).