I would have to say Effective Communication. Mainly because if everyone you have a team arguing over every option you are not focusing on one thing. This way you can discuss each option and have less of a divide if you all communicate what you feel effectively.
It could also be Leadership because as a leader you can avoid it completely and choose for your team. However based on what they are asking I still believe it would be B.
Answer:
Microsoft Excel
Explanation:
They are things that you can see but you cannot touch.
Refer to the attachment!!