Hoi!
"As a result" indicates a cause-and-effect sentence. This sentence discusses the price of shipping goods, which lessened due to better ways of transportation. The price lessening is a result of of new transportation methods, so "As a result" is the correct answer.
Answer:
My mother is the best mom, she does everything for me and I'm eternally grateful for her.
Explanation:
The Diary of Anne Frank. This book goes over the life of a young Jewish girl forced to live in a neighbors attic during WWII in Nazi Germany.
The other books are all unrelated to WWII.