C
As NT believers we have no excuse because that middle wall of partition has been broken down and both Jew and Gentile who believe have been placed in Christ and are one body with Christ as their head. Jews who believe can't separate themselves from Gentiles who believe because they have the law. You can't use the keeping of the Sabbath to make yourself distinct from others when there is no Jew or Gentile in Christ as one body. That would be division and Christ is not divided because the Spirit has been given to both. In Christ keeping the law of the Sabbath has no place, but to do the work of the Father on that day Christ has given us so many illustrations of by doing what He did on the Sabbath. I would venture to say that Christ did His greatest work on that day because so many Sabbath keepers were looking to see the next work He would do so that they might accuse Him. If we really want to honor God on the Sabbath we should do His work with our hands, our feet and with our tongue as a labor of love because we have already entered into His rest.
However, the gentile believers do not support the root, but the root supports the gentile believers.
It wasn't Sabbath keepers but rather Pharisees and scribes, who looked to accuse the Messiah of offending the Sabbath very much like the questions asked of Sabbath keepers here.
No one Sabbath keeper is against good work such as what the Messiah has done so who are you speaking against?