What type of sampling is being used if the state is divided into counties and a sample is chosen from each county to be surveyed? A cluster
B random
C systematic
D stratified

What must students do with the 10 gird-ins on the math section of the psat

In 1919, the temperance movement finally succeeded. they secured ratification of a constitutional amendment (the that banned alcoholic beverages. prohibition began with the 1920 passage of the which enforced the amendment.

Dna is a polymer of which consist of a sugar, a phosphate group, and a a. amino acids; nucleotide b. nucleic acids; nucleotide c. nucleotides; nitrogenous base d. nucleotides; nucleic acid e. proteins; nucleotide