The answer in the question provided is letter b, lack of
industrialization. It is because developing nation or country usually involves
of having industrial bases to be less develop than of the developed countries
in which lack industrialization is one of the things found in a developing
nation.
Germany fell behind with its war reparations as they were so high and if wrong sorry
Technology has improved, we got video games, arcade halls, more to do with phones and computers, so that means thst advertisers could advertise their stuff on computers.
(I dunno I guess that's the only connection I saw...)
