According to sources, the most probable answer to this query is d. A world free from fear is not possible in the near future.Fear is a builtin mechanism that is not easy to combat and will still be a struggle in the future. Thank you for your question. Please don't hesitate to ask in Brainly your queries.
Answer:
They actually don't
Explanation:
Their time travel story has no legitimate, scientific explanation
He is going on vacation to a beautiful San Diego beacg
B. Written by the experts