I would say that the social support systems of developed countries are far more advanced than those in developing countries. Developed countries invest about 40% of total money into these programs that ensure the safety of their citizens. On the other hand, developing countries invest less that 10% which means that the system is poorer and doesn't provide much for citizens.
I think it’s d but I might be wrong
Okay here it goes: She is basing her research on the results of the survey.<span />
No it wasn't the engine of economic growth