On a different note regarding this particular WT Study:
The material went on to describe Jesus handing over care of his mother to the apostle John. (Jn 19:26-27) To be fair, the WT is not alone in saying that it was John. But ...
"The disciple [Jesus] loved" in Jn 19:26 is never identified with John in the entire 4th gospel. He is only ever identified by name with Lazarus. (Jn 11:1-3)
Moreover, Jn 19:27 says that this disciple 'took Mary into his home that very hour.' What makes this interesting is that we are never told in the NT whether the apostle John has a home. And if he did, it would have been in Galilee which is several days walk from Jerusalem (especially with an aged parent in tow). On top of that, the gospel accounts seem to indicate that both John and Mary were in Jerusalem at least until Pentecost.
On the other hand, Lazarus did have a home (and nearby, at that). He was also a faithful disciple of Jesus, just not a travelling companion like the apostles. And, he also had two faithful sisters who, based on the limited commentary in the gospel accounts, would have been more than happy to have helped take care of Mary.
There is more that could be added to that. For example, Jesus predicted that the apostles would all abandon him during his execution. Peter is the only apostle who followed behind. But he also eventually abandoned him after denying him. So that would imply that the "disciple that [Jesus] loved" who was at the execution site was someone other than John.
I have a few more details about this (such as how Acts 6:1-2 relates to this) posted here (and see included links) (Off site)