निम्नलिखित में से कौन सा एक ऐसे प्रश्न का उदाहरण है जिसके लिए छात्रों को अपने स्वयं के चिंतन पर विचार करने की आवश्यकता होती है?

Assertion (A): While teaching problem-solving, teachers should discourage children from thinking about their own thinking and focusing on how to learn. Reason (R): The development of metacognitive abilities hinders effective problem-solving. Choose the correct option.

Thinking about one's own thinking is known as ______ and is a ______ ability.