Final answer:
The BMP format, also known as Bitmap Image File, can support RGB color model and Indexed Color mode, accommodating a wide range of detailed graphics and simple icons with a color palette of up to 256 colors.
Step-by-step explanation:
The BMP format supports various color modes. The correct answer to the question, 'What color modes does BMP format support?' is A) RGB and Indexed Color. BMP, which stands for Bitmap Image File, is a raster graphics image file format that can store bitmap digital images. It supports both the RGB color model where color images are made up of red, green, and blue components, and the Indexed Color mode which uses a palette of up to 256 colors, making it suitable for complex as well as simple graphics.