麻烦说明理由!he believe,( ),that people should start as early as possible to look at the world and at the world and atnature and to think about what they saw.A as does his mother B as his mother does C as did his mother D his mother as did

麻烦说明理由!
he believe,( ),that people should start as early as possible to look at the world and at the world and atnature and to think about what they saw.
A as does his mother B as his mother does C as did his mother D his mother as did