Which of the following psychological statements is most authentic and scientifically valid regarding the concept of 'Metacognition'—propounded by John Flavell and highly significant in cognitive psychology, defined as "knowledge about cognition" or the high-level capacity for awareness, monitoring, and self-regulation of one's own cognitive processes (such as thinking, learning, remembering, and understanding)—in relation to its actual psychological implications and classroom teaching for students' autonomous learning, effective selection of problem-solving strategies, and scientific operation of critical thinking?