Option 1 -> The passage shows she plans to spend the money, not save it for future needs.
Option 2 -> While she mentions saving darning work, this is a side benefit, not her main source of excitement.
Option 3 -> All her planned purchases are for her children (Janie, the boys, and Mag), nothing for herself.
Option 4 -> The passage explicitly states: "The vision of her little brood looking fresh and dainty and new for once in their lives excited her and made her restless and wakeful with anticipation."
Hence, Option 4: Seeing her children look fresh and dainty -> The text directly confirms that imagining her children looking "fresh and dainty and new for once in their lives" is what excited her and made her "restless and wakeful with anticipation," revealing her selfless, maternal devotion -> correct