Pls help i dont understand :( WILL MARK BRAINLIEST + 25 POINTS !!

Which of the following factors is not used to measure a country’s standard of living? a.) life expectancy b.)educational levels c.)divorce rates d.) gross income

Brian's school locker has a three-digit combination lock that can be set using the numbers 5 to 9 (including 5 and 9), without repeating a number. the probability that the locker code begins with a prime number is %. the probability that the last digit of the locker code is an odd number is %.

According to the earth science reference tables, during which geologic time period were the continents of north america,south america, and africa closest together?