If you read each of these, or speak them, there is only one that suits the sentence correctly.
Go with the third one. Couldn't seems to fit pretty well there.
To actually make sure they are doing anything, and that they see that they are making progress
The quote from "My Heart Is Bursting" most contributes to the assertive tone of Satanta’s speech is All the chiefs of the Kiowas, Comanches, and Arapahos are here to-day; they have come to listen to good words. I hope the answer helps.
She didn't want Persephone (Demeter's daughter) to be in a gloomy place but Hades and Demeter strike a deal "If you let me marry your daughter i'll give her back for 6 months and after the 6 months are over you give her to me and we go back and forth." Hades said. Demeter agreed and also that's why we have seasons
I really hope I helped
-Ciel
