Answer:
a. dependent
Step-by-step explanation:
The personality disorder characterized by unreasonable fear of abandonment, fear of being rejected, avoidance of disagreement, inability to make decisions for oneself, and clinging behavior is dependent personality disorder.
Dependent personality disorder is characterized by fear of been separated from the people you love and rejection, it is the excessive need to be taken care of that leads to clingy behaviour and fear of separation and it begins in early adulthood.