जीन पियाजे के संज्ञानात्मक विकास के सिद्धांत के अनुसार, जब बच्चे सामान्यीकरण करने, काल्पनिक परिकल्पनाओं का उपयोग करके व्यवस्थित रूप से सोचने और मानसिक रूप से उनका परीक्षण करने की स्थिति में पहुँच जाते हैं, तो वे किस अवस्था में होते हैं?

Match the stages of cognitive development in Column I with their major characteristics in Column II: Column I a. Pre-operational stage b. Sensorimotor stage c. Concrete operational stage d. Formal operational stage Column II I. Manipulation of objects in the environment II. Child begins to think abstractly and logically about hypothetical terms III. Child begins to acquire vocabulary and use symbols IV. Child learns to perform logical concrete operations such as adding, subtracting, multiplying, and dividing

Despite their abilities to solve different kinds of problems, ________ children still cannot think hypothetically.