1 – Correct
The acrylamide itself is not harmful but its product glycidamide is. Since humans produce less glycidamide, acrylamide is not as harmful to humans as animals.
2 – Wrong
Cooking over 120ºC causes glycidamide to be produced which is harmful.
3 – Correct
Cooking at lower temperatures causes more fat to be ingested meaning that it is harmful.
So 1 and 3 are correct. The answer is D.