Answer: A) hygiene factors
Explanation:
Herzberg's theory states about motivating elements are necessary for keeping up motivation of an employee for achievement, working hard,advancement etc.These factors are satisfier for providing satisfaction .
According to the question,Colin should concentrate on hygiene factors as it will act as satisfier in the job through management. He will be motivated and looking forward for achievement.
Other options are incorrect because growth needs, esteem requirements, requirement of achievement and motivation factors are not the traits that should be focus of Colin as per Herzberg's theory.Thus, the correct option is option(A).