Child is a noun. Childish is an adjective :)
<span>In active sentences the thing doing the action would be the subject of the sentence and the thing receiving the action is the object. So I would think A would be the best choice.</span>
When you are a child, if you grow up in an abusive household, you learn to be more aggressive. However, if you have a loving household, you're more likely to be considerate of others. There are many other examples, such as someone smiling to you could save your life, while someone being rude could end it. It only takes one gesture to change someone's world.
