Answer:
D. communication
Step-by-step explanation:
Communication is the ability to convey a specific intent or idea to other people in an efficient manner. This skill is very important in an organization setting where people have different varieties of skills and expected to work with one another toward a certain goals.
From the options above:
Option A is wrong because computer literacy is considered as a hard-skill. (it's not necessarily a 'people skill')
Option B is wrong because skills to provide great customers service only applicable if you work as a front-line in a service-based industry
Option C is wrong because even though ability to problem solve is a valuable skills, the there are only specific job position that require it. Communication skills on the other hand is needed in almost every position in all Industries.