___________provide starting points for solutions that can be customized and added to the Guidewire products.

Comprehensive and Detailed Explanation:

Accelerators (Option D) are the correct Guidewire term for pre-built solutions provided by Guidewire or its partners (available on the Guidewire Marketplace).

Definition:An Accelerator is a software asset that provides a "starting point" for a specific business problem or integration (e.g., a "London Market Accelerator" or a specific "Payment Gateway Accelerator").

Purpose:They are designed to becustomized. Unlike the core product (which you configure) or a SaaS service (which you consume), an accelerator is often code or configuration that you download, install, and then modify to fit your specific project needs. They are not "plug-and-play" in the strictest sense; they accelerate the development by providing the foundational code.

Why other options are incorrect:

B. Extension Packs:While similar, "Extension Packs" (now often referred to as simply Extensions or Standards-based templates) typically refer to smaller, verified add-ons that might not require as much "customization" as an accelerator. However, "starting point for solutions" is the textbook definition for Accelerators.

A. User Story Cards:These are documentation artifacts, not software solutions.