सामाजिक संरचनावाद (Social Constructivism) का सिद्धांत, जो संज्ञानात्मक विकास में सामाजिक संपर्क की महत्वपूर्ण भूमिका पर जोर देता है, किसके द्वारा प्रतिपादित किया गया था?

A teacher recognising diverse learning styles in her class is applying which of the following approaches?

Assertion (A): Skinner's Programmed Instruction is based on the principles of operant conditioning including immediate reinforcement and small steps. Reason (R): Programmed Instruction allows learners to progress at their own pace and receive immediate feedback on responses.