What must grape juice and products containing grape juice be handled and pressed by?

The handling and pressing of grape juice and products containing grape juice must be done by Sabbath-observing Jews in order to adhere to the laws of kashrut, which govern what is permissible in Jewish dietary laws. This specific requirement ensures that these products are considered kosher. The reason behind this is rooted in the concern that wine and grape juice could be used for sacramental purposes. To prevent any potential issues related to the use of non-kosher wine or juice, it is mandated that the grape products are handled in a manner that aligns with Jewish law. This is particularly important in maintaining the integrity and traditional values within Jewish communities, as it emphasizes the significance of who is responsible for the production of these religiously important items.

The other choices do not fulfill the religious requirements necessary for the kosher status of the grape juice.