To develop the thesis statement "the ease and ability to make friends evolves over a person's lifetime," the most relevant answer would be:
Adults should seek out clubs or interest groups to find like-minded individuals.
This detail supports the thesis by highlighting that as people transition into adulthood, they may need to take proactive steps to forge friendships, which indicates that the dynamics of making friends change as one ages.
The other answers either don't directly address the development of friendships over a lifetime or focus on specific statistics or trends that are less relevant to the evolution of social connections.