Answer:
I believe the answer A.
Step-by-step explanation:
A coin has 2 sides - heads and tails.
A fair number cube has 6 sides - 1, 2, 3, 4, 5 and 6.
When doing a tree diagram, you show all the possible outcomes that you can get.
The other options either have missing numbers from the cube, a missing side from the coin, or both.
Hope this helped. :)
