Suppose Earth's rotation axis was not tilted relative to its orbital plane. If Earth's rotation axis were exactly perpendicular to its orbital plane, then a. everywhere on Earth would always experience equal amounts of daylight and nighttime.
b. more than one of the above is true.
c. Earth would not experience seasons.
d. the Sun would always rise and set at the same points on the horizon. e.the ecliptic would line up with the celestial equator.