Which of the Following Examples Depicts Closed-Mindedness

Which of the following examples depicts closed-mindedness?

A) Nonprofit director Dana is skeptical that her friend's investment scheme will pay off, but is willing to learn more about it.
B) Math teacher Roland, an avid golfer, tries playing disc golf a few times but is sticking to traditional golf.
C) Journalist Sable, born in Botswana, loves the African yogurt madila, but she enjoys Greek yogurt too.
D) Graphic designer Carla avoids discussions about vegetarianism because she is a big supporter of the cattle industry.
E) Store manager Sam, who has a learning disability, overcomes his hesitancy to read to elementary-age children.