One of the segments of the given sentence contains an incorrectly spelt word. Identify the option that rectifies this spelling error. (A) The vociferous (B) campaign for equal rights, though met with resistance (C), became a pivotol (D) force in reshaping societal attitudes towards gender equality.

1. (D) societol
2. (A) vociferrous
3. (C) pivotal
4. (B) ressistance