Final answer:
The detail from the passage that supports the answer in Part A is Dr. Smith's renowned adventurous spirit.
Step-by-step explanation:
The detail from the passage that supports the answer in Part A of the question is option B: 'Dr. Smith, the explorer, was renowned for his adventurous spirit.' This detail supports the answer because it indicates that Dr. Smith, who is mentioned in the passage, has a reputation for being adventurous. This supports the idea that the hot air balloon journey described in the passage was an adventurous and daring expedition.