In the book of Joel, what is the primary symbolic significance of the locust plague described, beyond just being a literal agricultural disaster?

A It represents a warning of impending judgment and a call to repentance, urging the people to return to God before a greater devastation occurs. B It symbolizes the power of nature to overcome human efforts. C It primarily symbolizes the economic hardship caused by foreign trade. D It mainly foreshadows the rise of a powerful military leader.