What can we learn about Tata group before Ratan Tata took over it？A．Ratan Tata has transfo

、What can we learn about Tata group before Ratan Tata took over it？
A、Ratan Tata has transformed the Tata group.
B、A huge collection of Tata companies are cumbersome conglomerates.
C、It may be tough for Tata group to face competition outside.
D、There was no transformation in the Tata group.