Which sentence from the article would be MOST important to include in a summary of the article?

A
Still others lie to take advantage of people — perhaps even to cheat them or to steal from them.
B
Working memory keeps something in mind just for a little while — such as remembering instructions for how to play a game or some other specific task.
C
When the prefrontal cortex is busy with tasks related to lying, she notes, it now has a harder time doing other tasks that require planning, self-control or working memory.
D
When you give insincere compliments, for example, you may make your friends feel good — at first, anyway.