Answer:
d. Aside
Step-by-step explanation:
The dramatic convention where the characters speak to each other in a way that the audience can hear, but not a concealed character, is called an aside. An aside is when a character speaks directly to the audience, as if sharing a secret thought or feeling, while the other characters on stage cannot hear what is being said. It is often used to provide the audience with information that the other characters are not aware of, or to reveal the true thoughts and intentions of a character, without the other characters on stage understanding what is going on.