Answer: Because Antonio Meucci was a trained engineer, he was able to invent a “talking telegraph.”
Explanation: This is the correct answer because the cause of his invention is the fact that he is a trained engineer, and the effect is the creation of the talking telegraph.
You need to put more space in it this is to hard to read
A. Gloomy
This is because if you read it, it is definitely not bittersweet. Ravens are signs of death and this is not murderous because no one is really getting murdered, its just the gloomy feeling of not knowing and how it is constantly happening.