During the Vernal Equinox what occurrence takes place that happens only twice a year? A. The Sun's rays are perpendicular to the equator causing 12 hours of daylight on both Northern and Southern Hemispheres.

B. The Sun's rays are perpendicular to the Prime Meridian causing 12 hours of daylight on both Northern and Southern Hemispheres.

C. The Sun's rays are perpendicular to the Tropic of Cancer causing 12 hours of daylight on both Northern and Southern Hemispheres.

D. The Sun's rays are perpendicular to the Tropic of Capricorn causing 12 hours of daylight on both Northern and Southern Hemispheres.