Women who get angry at their boyfriends, husbands, etc. may think that it's alright to hit them since they're 'stronger' than women, and women are rarely ever seen getting prosecuted for domestic violence. Men may think it's okay to assault women based on their clothing, and will project their own aggression on to a less threatening source, women, since they are seen as weaker.
I would have to say that the best way to revise sentence four is by changing "aren't" and "they're" to "are not" and "they are."
"Argue" works better than "fight."
Deleting the entire sentence would remove the transition into cost efficiency of the tablets.
And moving the sentence to the end would place the transition to cost efficiency in the wrong place.
