Which of the following statements about continuous variables is A. continuous variables must lie between a clearly defined interval
B. continuous variables may be restricted to positive values
C. continuous variables will never be nonzero
D. continuous variables must always be restricted to positive values

I think it's A

must lie btn a clearly defined interval

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in

regents of the university of california v. bakke, 438 u.s. 265 (1978), was a landmark decision by the supreme court of the united states. it upheld affirmative action, allowing race to be one of several factors in college admission policy.