What is meant when we talk about sociology perspective

Why is it economically necessary for the east germans to build berlin wall

In the kingdom of saudi arabia the government controls every aspect of oil production which makes up the majority of the country's economy. while other businesses are owned by individuals, the biggest segment of saudi arabia's economy is oil production. saudi arabia's economy would best be described as a) entirely market. b) almost entirely command. c) a mixture between just market and traditional. d) a mixed economy with large amounts of command.

The pka of three different c―h bonds is given below. explain the observed trend in pka. select the single best answer.