Would the following sentence, by the strictest standards, be considered correct by a linguist?

The manner which Jack disappeared in was creepy.
OPTIONS:
- unacceptable
- acceptable
unacceptable
Skulle följande mening, med strängaste mått mätt, anses vara riktig av en språkforskare? Det sätt som Jack försvann på var läskigt. ALTERNATIV: - oacceptabelt - godtagbart
Would the following sentence, measured by the strictest measure, be considered correct by a linguist? The way Jack disappeared was scary. ALTERNATIVES: - unacceptable - acceptable
oacceptabelt
unacceptable