Concept:September 23 is the September equinox, when day and night are approximately equal in the northern hemisphere.
Explanation:On this date, the sun is overhead at the Equator.
The northern hemisphere receives about
12 hours of daylight and
12 hours of darkness.
Therefore, day length equals night length for every town or city in the northern hemisphere.
Since day and night are balanced, no northern town can have a day that is longer than its night.
This means "longer days and shorter nights" cannot occur on September 23.
Option A describes the condition that actually takes place, so it is not the correct answer.
Answer:D. longer days and shorter nights