The weather was cold and rainy when I drove Sid to the airport.
Explanation:
This sentence is the only one that is with all the verbs, pronouns and nouns written with correct grammar forming a sentence with coherence and cohesion. That is why this is the only sentence that makes sense and that allows the reader to understand the story that the sentence wants to pass.
Amos feels Harry is responsible for Cedric's death.
Explanation:
Amos says, "How many people have died for the Boy Who Lived? I'm asking you to save one of them." He thinks that Cedric died for Harry to live, and that it is Harry's fault.