The correct answer is C. Communication
Step-by-step explanation:
The word "communication" refers to the process of both transmitting and receiving messages of any kind, which usually occurs between two or more people. This implies communication competency focuses on skills, abilities, etc. you need to effectively transmit ideas, opinions, etc. but also receive and understand those transmitted by other people and after this respond effectively to these messages. Besides this, communication skills require a basic understanding of interaction and adaptability to communicate written, verbally, etc. According to this, the competency described is communication competency because this one is the one that involves "transmitting, understanding, and receiving ideas, thoughts, and feelings".