This architectural diagram depicts a system that streams data from thousands of devices. You want to ingest data into a pipeline, store the data, and analyze the data using SQL statements. Which Google Cloud services should you use for steps 1, 2, 3, and 4?

A. 1. App Engine
2. Pub/Sub
3. BigQuery
4. Firestore B. 1. Dataflow
2. Pub/Sub
3. Firestore
4. BigQuery C. 1. Pub/Sub
2. Dataflow
3. BigQuery
4. Firestore D. 1. Pub/Sub
2. Dataflow
3. Firestore
4. BigQuery