Respuesta :
The 3rd should be correct: If you pay attention to his words, you can tell he has a bias toward cats.
The one that is most correct is the third option:
If You Pay Attention To His Words, You Can Tell He Has A Bias Toward Cats.
This is correct because a bias is defined as, "prejudice in favor or against something".
If You Pay Attention To His Words, You Can Tell He Has A Bias Toward Cats.
This is correct because a bias is defined as, "prejudice in favor or against something".