The longest day of the year in the northern hemisphere, or summer solstice, falls near june 21 every year. this is when the sun is at the top of its rotation.
according to context clues, which best defines the underlined words?

a. the day with the least amount of sunlight each year.
b. the day with the greatest amount of sunlight each year.
c. the day the sun is at its lowest rotation
d. the day the sun is at its fastest rotation