Question

(1) Edgar Allan Poe wrote the short story “The Tell-Tale Heart.” (2) Poe wrote the story in 1843. (3) In the story, a man is haunted by an old man’s eye. (4) He thinks it looks like the eye of a vulture. (5) We soon learn that the haunted man has a mysterious disease. (6) The disease has made the man insane. (7) He does not know it. (8) For seven nights, he sneaks into the old man’s room. (9) He watches the sleeping man. (10) I will not tell you what happens next because I do not want to spoil the story for you. Which is the most effective way to combine sentences (6) and (7)?

Not known by him, the disease has made the man insane.
Making the man insane, the disease is not known by him.
The disease has made the man insane, but he does not know it.
The disease has made the man insane he does not know it.

Answer 1

C is the best answer. Hope this helps. 

Answer 2

The best option to combine sentences 6 ans 7 is "The disease has made the man insane, but he does not know it."

Step-by-step explanation:

Option c combines sentences 6 a 7, which are independant sentences, into a compound one. Both sentences are now linked by the coordinating conjunction "but" since it shows contrast between the ideas. According to the context, this option is the best one since it makes the reading smoother and cohesive.

Options A and B are grammatically correct but do not follow the tone and simple sentence structure of the rest of the excerpt.

Option D is grammatically incorrect since it is linking both sentences without a coordinating conjunction or semicolon.