What are two reasons the Confederates Confederates ended up in Gettysburg, PA?

According to ohrp, a problem is an “unanticipated problem” when it meets which of the following criteria: unexpected, related or possibly related to the research, suggests that the research does not put the subjects or others at greater riskunexpected, related or possible related to the research, suggests the research puts subjects or others at greater riskunexpected, unrelated to the research but still occurring with a subject, suggests the research puts others at greater riskexpected, related or possible related to the research, suggests the research puts others at greater risk

Surfaces of paintings—such as paper, canvas, and pottery—are referred to technically as

Which of the following statements best describes the concept behind labor unions?