Retort. Retorts are answers to remarks that are delivered in a sharp and witty manner, also they're often angry.
A. To explain how meaning is sometimes lost when communicating only through e-mails
The first one is correct because the nouns (The names including Mrs and Lord) are capitalized.
I think it is due not do. Because due is like a bill is due or home work is due. While do is like I’m going to go do something
