"I may never know for sure whether some of my childhood memories are real or accurate." Which of the following critical thinking guidelines does this example illustrate?

According to the article Spaced Out, about the architecture of living spaces, the participants were

(a) all females (b) all males (c) about half males and half females (d) of unknown sex because the article did not report this information

Which of the following statements about grandparents who are primary caregivers is true?

A) Warm grandparent–grandchild bonds help protect children from worsening adjustment problems, even under conditions of great hardship. B) Less than 1 percent of the U.S. child population live with their grandparents but apart from parents. C) Grandparents in Caucasian families are more likely to serve as children's primary caregivers than grandparents in other ethnic groups. D) Grandparent caregivers rarely forge significant attachment relationships with their grandchildren.