An organization needs to categorize a large group of photographs using (Digital Leader)

Correct answer: A) Vision API.
Here's why:

Vision API is specifically designed for image analysis and recognition tasks, including image classification. It offers pre-trained models that can automatically assign labels to images based on millions of predefined categories.

BigQuery ML is used for building machine learning models on structured data, not image data.

AutoML Vision is a more advanced option that allows you to build custom image classification models, but for a large group of photographs with pre-trained models available, Vision API is a simpler and faster solution.

Looker is a data visualization tool and doesn't handle machine learning tasks.