Which estimation tool is the Scrum Team using?

A Scrum Team is estimating the prioritized User Stories. Each team member has been assigned a deck of numbered cards, in which each card is numbered in a sequence. The team members use these cards to assess a particular User Story by picking and showing a card from the deck that represents their estimate for the User Story.

Which estimation tool is the Scrum Team using?
A . Fist of Five.
B . Wideband Delphi.
C . Affinity Estimation.
D . Planning Poker.

Answer: D

Explanation:

Planning Poker is an agile estimating and planning technique that is consensus based. To start a poker planning session, the product owner or customer reads an agile user story or describes a feature to the estimators.

Each estimator is holding a deck of Planning Poker cards with values like 0, 1, 2, 3, 5, 8, 13, 20, 40 and 100, which is the sequence we recommend. The values represent the number of story points, ideal days, or other units in which the team estimates.

Reference: https://www.mountaingoatsoftware.com/agile/planning-poker