Which Memory from Shannon's Grade-4 Experience Would Be an Episodic

Which memory from Shannon's grade-4 experience would be an episodic memory?

A) The low-level clouds that look like sheets floating in the air are called stratus clouds.
B) Ten centimetres of snow contains the same amount of water as 1 centimetre of rain.
C) To mark his territory, a wild boar scrapes a tree as high as he can with his tusk.
D) For the last two months of school she shared her NHL mechanical pencil with Nick.