<span>Science and technology are progressing at an alarming pace compared to value progression in the society. So Instead of putting technology only for the right use, society uses that in dangerous other ways.</span>
The relative pronoun 'who' refers to 'people' which is a subject of this sentence, so the correct answer is C, this is also a subject.
THE ANSWERS ARE:
-The master stopped at the rusty iron door and pulled it open on rasping hinges.-We saw him disappear down the steps into the dark,<span>-Then we heard the awful, terrifying sound that haunted our sleep</span>
"<span>In </span>Hamlet<span>, the </span>tragic<span> flaw determines his downfall in the play. And his </span>tragic<span> flaw is his indecisiveness that is due to grave thinking on the topic of whether vengeance is wrong or right, and whether to kill his father's murderer or not."
This may be helpful. </span>