The development of Astroworld ("the amusement park of the future") on the outskirts of a city will increase the city's population at the rate given below in people/year t years after the start of construction. 3,000t−10,000. The population before construction is 35,000. Determine the projected population 4 years after construction of the park has begun.

A) 25,000
B) 15,000
C) 20,000
D) 10,000