What scope levels available for dimensions and metrics?

• Hit-level, session-level, product-level, or user-level scope
• Location-level, duration-level, product-level, or user-level scope
• Event-level, session-level, transaction-level, or user-level scope
• Event-level, duration-level, transaction-level, or user-level scope

Correct answer is:

• Hit-level, session-level, product-level, or user-level scope

Explanation: Scope determines which hits will be associated with a particular custom dimension value. There are four levels of scope: product, hit, session, and user:

• Product – value is applied to the product for which it has been set (Enhanced Ecommerce only).
• Hit – value is applied to the single hit for which it has been set.
• Session – value is applied to all hits in a single session.
• User – value is applied to all hits in current and future sessions, until value changes or custom dimension is made inactive.

Read more here: https://support.google.com/analytics/answer/2709828#scope