phycology

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Which one of the following instances is an example of qualitative change?

A. Last year two-year-old Helga could not talk, but now she can carry on a conversation.

B. Fifteen-year-old Marty grew 3 inches over the summer. He is now taller than Dad.

C. Nine-year-old Billy Bob can jump 2 inches higher now than he could last month.

D. Topia has learned 2 new words.

I am a little confused, but my choice is A. Is that right?

  • Psychology -

    Right. The other answers show quantitative changes.

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