A. Fear as the motivating force - fly to Christ to escape God's fierce wrath.
In the last line of the excerpt, Edwards admonishes his congregation to awaken and flee from the impending wrath. This implies that the motivating force he predominantly uses is fear, as he emphasizes the consequences of not being "in Christ" and facing the wrath to come. Edwards seeks to instill a sense of urgency and the need for salvation based on the fear of God's fierce wrath.