Which of these best describes a random sample? A. a very large survey like the US census B. a small part of a larger population that is selected by chance
C. the entire population that a survey question applies to
D. a researcher conducting a large survey and choosing questions by chance​

Plz answer asap! i will reward brainliest and 12 points for these three questions!take notice: these three questions are completely different! 1) what is the percentage of sugar in the syrup made of 10 kg of water and 4 kg of suugar? 2) what was the original price if after 10% discount it became $450? 3) at first a price was decreased by 12%, then it was disounted again by an additional 5%. what is the percent of the total discount? , and remeber i will award brainliest and 12 points!