Answer:
D). "Unless the status of women changes in sub-Saharan Africa, we're going to have a lot more than one billion hungry by midcentury."
Step-by-step explanation:
As per the question, option D displays the sentence from the excerpt that involves a cause-and-effect structure as it begins with the description of a cause or reason that 'Unless the status of women changes in sub-Saharan Africa' it would lead to the various unexpected and severe effects or consequences like 'having a lot more than one billion hungry by midcentury'. Such a structure assists the author in explaining how 'the famine is a feminist issue' and assists the author to persuade the audience to accept and believe in his claim. Thus, option D is the correct answer.