Which of the following statements is true about the sun's layers? a) There are three interior layers, one surface layer and two atmosphere layers; all layers are gaseous.

b) There are three interior layers, one surface layer and two atmosphere layers. All the layers but the metallic core are gaseous.

c) There are six layers: three interior layers, all solid, a surface layer and two gaseous layers.

d) There are six layers: two interior layers and four outer layers. All layers are gaseous.