The author's explanations of the first three answers aren't sufficient. There is no requirement within C for `int` and `char` to be different sizes. Similarly,

The author's explanations of the first three answers aren't sufficient. There is no requirement within C for `int` and `char` to be different sizes. Similarly, you don't know what the resolution of ' '*13 will be. It's architecture dependent. C, for all it's simplicity, is a relatively complex language.