The functions BUILD_STAGE_FILE_URL and GET_PRESIGNED_URL can be used to share unstructured data through a secure view. BUILD_STAGE_FILE_URL creates a secure URL for files in a stage, ensuring they can be securely accessed, while GET_PRESIGNED_URL generates a pre-signed URL that grants temporary access to files, enforcing security measures. These functions are tailored for sharing unstructured data securely, whereas other options do not specifically cater to secure data sharing.