Final answer:
The most commonly cited reason for ending friendships due to life circumstance changes is lack of communication, often influenced by factors like physical distance and significant life events. Correct option is b.
Step-by-step explanation:
The most commonly cited reason for ending a friendship due to changes in life circumstances is lack of communication. Relationships and friendships often change or dissolve when individuals do not maintain regular contact with each other. This can be exacerbated by a variety of factors, such as physical distance, when friends move to different locations and find it difficult to stay in touch. Changes in life circumstances, like retirement or a move, can lead to reduced interactions and a sense of disconnectedness.
For instance, an older man who retires, stops participating in social activities, and experiences a loss may find himself becoming distant from his friends due to these life changes. While other factors such as betrayal and differences in interests can also lead to the end of friendships, communication is often at the heart of these issues, and its absence can signify the weakening of a relationship.