Hello!
Your answer is the second option.
Hope this helps!
Step-by-step explanation:

Answer:
B. stratified.
Step-by-step explanation:
If a population is composed by identifiable groups or strata, with large variations between groups, the stratified sampling should be applied in order to comprehend and represent all of the different groups in the sampling process.
Therefore, the answer is alternative B. stratified.
Part 1:
3,0,-2,7
Part 2:
A,C,D
Say if you have 55/10 thats an improper fraction so in order to turn that into a mixed number divide 55 by 10 which you will get 5. Something right so the 5 will be your whole number 5 then your leftover is 5 so you will put that 5 over 10 so the mixed number will be 5 5/10 but you can simplify that to 5 1/2