Which of the following describes a situation in which it is reasonable to reach a cause and effect conclusion based on data from a statistical study? Group of answer choices The study is based on a random sample from a population of interest. The study is observational, and the sample used is not a convenience sample. The study is an experiment that uses random assignment to assign volunteers to treatments. The study is observational, and the two samples uses are not a convenience samples. It is always reasonable to reach a cause and effect conclusion based on data from a statistical study