Which best identifies the text structure used in "gumption'

Which event in macbeth happens first? oa. the witches plan to trick macbeth and make him overconfident.ob. lady macbeth feels guilty and kills herself.oc. macbeth learns that macduff was not "born of woman."od. banquo is killed but his son, fleance, escapes.

Plz change it i can not change this sentences .

Which of these websites would be least likely to provide credible reference material for researching stress?