I agree with everyone else that your daughter is good looking and looks great here. But I also want to say that it is her style, her body. If she truly isn’t comfortable in an outfit, then it will hang in what is probably a teensy-tiny college closet, taking up space and never being worn. In that case, better to split these up and find something else to go with the pants. In time she may combine them, but at least they won’t take up valuable real estate for nothing.
How funny that she doesn’t want plaid + florals in that outfit, but seems very happy to have them combined in the dress in 4. I agree with others that the dress is unlikely to pass the sit test for work. I bet the HR company has guidelines for candidates in what to/not to wear, and for recruiters on what clothes to ding a candidate’s score for. Maybe have her look those up and draw her own conclusions. (That’s what I’d have to do with my son). If she wants to return it, that could cover the cost of new matches for the pants & top in 2.
I like 3, think the skirt has enough pleats to be fine sitting down. It’s cute with the floral top!