Answer:
In the years since human beings first reached the summit of Mount Everest in 1953, climbing the world’s highest mountain has changed dramatically. Today, hundreds of mountaineers manage the feat each year thanks to improvements in knowledge, technology, and the significant infrastructure provided by commercially guided expeditions that provide a veritable highway up the mountain for those willing to accept both the risks and a hefty price tag.
Explanation:
Evidence that supports your choice of opinion. Factual evidence as well
The answer would be primary source since the interviewer is going first hand to a actual experienced person to gather information on, its not outdated source because that's like 1600's information on planes when its 2017, its not unreliable because unreliable is something you can't rely on or use since its not helpful, and its not a secondary source because that's like literature material research so therefore its A).
The most effective paraphrase is by studying the text more than 1. Summarizing and taking each paragraph step by step. Also jot down what seems important to you and/or the questions. Also take your time while reading.