In a renowned city, the average birth rate is 8 people every two seconds and the death rate is 6 people every two seconds. Estimate the size of the population net increase that occurs in one day. Pick:
A) 32,300	B) 172,800	C) 468,830	D) 86,400	E) 259,200

Rationale: "every 2 seconds , 2 persons are added ( 8 - 6 ) . every second 1 persons are added . in a day 24 hrs = 24 * 60 minutes = 24 * 60 * 60 = 86400 seconds . 86400 * 1 = 86400 option d"
Answer: D