B. Sarah had always dreamed of traveling the world, but she never had the opportunity to do so until she graduated from college.
C. Along the way, she encountered a diverse array of individuals, each with their own unique stories and perspectives.
D. With her degree in hand, she set off on a backpacking adventure across Europe, eager to explore new cultures and meet new people.
Correct Answer: (d) BDCA
Note: Sentence B will be the starting line as it contains the main idea of the parajumble i.e. The dream of Sarah. And, Sentence D states that she set off on a backpacking adventure across Europe. So, D will follow B. Further, Sentence C states Sarah's experiences during her journey & Sentence A concludes the paragraph by explaining the impact of Sarah's journey. So, A will follow C. Going through the options, option (d) has the correct sequence.