Your teammate has asked you to review the code below. Its purpose is to efficiently add a large number of small rows to a BigQuery table.

Which improvement should you suggest your teammate make?

A. Include multiple rows with each request. B. Perform the inserts in parallel by creating multiple threads. C. Write each row to a Cloud Storage object, then load into BigQuery. D. Write each row to a Cloud Storage object in parallel, then load into BigQuery.