No way that is a real question you have to answer.
Answer:
A) stratified
Explanation:
Total call including 6500 'yes' and 4100 'no' are 10600 and on each call there was a fifty cent charge. Total charge becomes 5300 $ so this is very straight forward data. And from this test two types of classes are made with cleared population in each class and such cleared population division is example of stratified sampling so this is right answer.
A mass movement of funds invested in the stock market could result in a stock market crash such as that of 1929.
c.
loose objects can be a huge distraction
