In September, the Intertropical Convergence Zone is shifted to:a. the north of the Isthmus and winds blow across the Isthmus from the northeast. b. the north of the Isthmus and winds blow across the Isthmus from the southwest. c. the south of the Isthmus and winds blow across the Isthmus from the northeast. d. the south of the Isthmus and winds blow across the Isthmus from the southwest