C: The Bulk API is designed for importing or exporting large volumes of data and works efficiently in development environments, but it respects storage limits.
D: Developer and Developer Pro sandboxes have different storage limits. Developer Pro has a larger storage limit compared to a Developer sandbox.
Why not other options?
A: Bulk API does not bypass storage limits.
B: The Data Import Wizard is a web-based tool, not an application installed on your computer.
Salesforce Data Import and Export
Salesforce Bulk API