Below is an extract from NYTimes, and i have small doubt on usage of "which" in the extract.
" The recent research details how disruption breeds disruption. This research includes the thousands of studies on attachment theory, which
show that children who can’t form secure attachments by 18 months face a much worse set of chances for the rest of their lives because they find it harder to build stable relationships.
It includes the diverse work on self-control by Walter Mischel, Angela Duckworth, Roy Baumeister and others, which
shows, among other things, that people raised in disrupted circumstances find it harder to control their impulses throughout their lives. "
There are two "which" used in the above paragraph.
First one refers to the "attachment theory" and I am not sure about the second "which" is it referring to "Diverse work" or "The Recent Research" ???
As given in MGMAT SC
"Which" should refer back to the immediate noun before the comma.
Experts plz help me out !