Arrange the following theories of language origin in the order they were first proposed:
1. Mother Tongue theory
2. Ding-dong theory
3. Bow-wow theory
4. Pooh-pooh theory
1
3, 4, 2, 1
2
1, 2, 3, 4
3
2, 3, 4, 1
4
4, 2, 1, 3
Arrange the following theories of language origin in the order they were first proposed:
1. Mother Tongue theory
2. Ding-dong theory
3. Bow-wow theory
4. Pooh-pooh theory