The photo taken using your smartphone is considered as input.
Input data refers to the information that is provided to a computer system or device whereas output data is the result that is generated by processing the input data.
When you capture a photo with your smartphone, you are essentially providing data to the device through the camera sensor. This data is in the form of an image and serves as an input to the smartphone's software and storage system.
This is the initial step in the process of creating a digital photograph and it doesn't become a hard copy (printout) until you choose to physically print it. So, in the context of the given options, the photo is best categorized as an input.
Therefore, the Option C is correct.