Multiple choice

My sister who enjoys torturing children, dressed up as Slender Man for Halloween this year.

  1. sister, who

  2. Slender, man

  3. Halloween, this

  4. no change

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The clause 'who enjoys torturing children' is non-essential (non-restrictive) information about 'my sister,' as indicated by the closing comma after 'children.' Therefore, it must be set off with a comma at the beginning as well, making 'sister, who' the correct choice.