Final answer:
Each cell in the Data Area of a QR Code is stored as a binary number, where binary encoding is standard practice for digital data transmission allowing for data clarity and compression.
Step-by-step explanation:
The Data Area of a QR Code is indeed a grid of rows and columns, and each cell in this grid represents a bit of data. In the field of digital communications, whether it's for cell phone conversations, television transmissions, or computer data, this information is commonly transmitted as digital data. This data is encoded in the form of a sequence of binary digits – ones and zeros. Each binary digit is known as a bit, which is the smallest unit of data in computing. As a result, the correct answer to what each cell in a QR Code is stored as would be A) Binary number. Using binary allows for clearer transmission of data, especially when signals are weak, and also enables the compression of digital data to optimize the amount of information transmitted across a given frequency range.