The Relative Inability of a Patient to Stay Focused on a Conversation

The relative inability of a patient to stay focused on a conversation during the initial evaluation of tasks such as donning or doffing clothing,preparing a basic meal on the stovetop,or doing mat exercises in a loud therapy gym is MOST likely indicative of a breakdown in which of the following cognitive systems?

A) Short-term memory
B) Attention
C) Long-term memory
D) Executive function