D] RAW vs JPEG
Your camera lets you record images in two different file formats: JPEG and RAW (NEF). JPEGs are smaller files, so you can fit more on a memory card, and they’re also a universal format, making them easy to share. The downside is that camera settings like Picture Control and White Balance are permanently embedded in the file.
NEF files, on the other hand, let you undo many of these decisions. This is because the files are saved in an unprocessed format that you later need to work up in RAW conversion software like Capture NX-D. Choose RAW for more creative flexibility, as well as providing a safety net on important shoots.
You could choose to shoot monochrome JPE Gs, but then you’ll be stuck with a black-and-white picture, when you may decide you want a colour version. Taking a photograph in RA W and converting it to monochrome in post-processing gives you more options