Final answer:
When team members are unsure about the meaning of a Sprint Backlog item, they can gather information, contact the customer, or ask the Product Owner for clarification.
Step-by-step explanation:
When team members are unsure about the meaning of a Sprint Backlog item, they should take certain steps to clarify their understanding.
The first option is for them to try to understand it themselves. They can do this by gathering information from customers and stakeholders, finding expert information, or doing a root cause analysis.
If they are still unsure, the team members should then contact the customer and ask for more information. This is especially important if the item is related to customer requirements.
Additionally, team members can also ask the Product Owner for clarification. The Product Owner should have a deep understanding of the product, its features, and the backlog items.
Therefore, the correct answer is option 4) A and B. Team members should try to understand the item themselves and contact the customer for more information if needed.