Plz help me well mark brainliest if correct......????

Answer:
Pony Express
Explanation:
Nowadays, we use letters, conversation, and doing research at the library. We don't use pony express, because that was when there was no technology, and we can send faster and more reliable technology.
i would say the answer is b but i would need to know what the quiz is about to be able to be completely sure about.