When 18-month-old kayla was at her day-care center, she understood that her father would be picking her up at the end of the day. kayla's understanding that her father continues to exist even when he cannot directly be seen or heard demonstrates?

How did the growth of railroads american businesses expand

Which is the most accurate description of the executive office of the president? groups of advisers who the chief of staff groups of advisers who the president groups of advisers who oversee national security groups of advisers who oversee the economy

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