Well if all 4 show up at the same time I would go with the elderly.
Because the wan with the baby can still stand and hold her baby.
The pregnant woman can still stand might be uncomfortable but she can do it.
The man on crutches may have trouble but he can stand as well. Or at least lean against the wall.
The elderly man could break a hip if the train/bus stops abruptly. He needs to sit the most.
So in other words.
1
Than
3
Than
2
Last
4
Than me.
Because the wan with the baby can still stand and hold her baby.
The pregnant woman can still stand might be uncomfortable but she can do it.
The man on crutches may have trouble but he can stand as well. Or at least lean against the wall.
The elderly man could break a hip if the train/bus stops abruptly. He needs to sit the most.
So in other words.
1
Than
3
Than
2
Last
4
Than me.