What Is the Difference Between Random Sampling and Stratified Sampling

What is the difference between random sampling and stratified sampling?

A) Stratified sampling combines random selection with predetermined weighting of a population's demographic characteristics.
B) Stratified sampling gives each member of a targeted population the same probability of being polled, whereas simple random sampling does not.
C) Random sampling incorporates random selection into the polling procedure, whereas stratified sampling allows for self-selection.
D) Stratified sampling relies on techniques to minimize bias, whereas simple random sampling does not.

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