26. The invention of a machine to make plastic corks for wine bottles has severely affected companies that produce traditional cork. The invention of the machine for making plastic corks is an example...

26. The invention of a machine to make plastic corks for wine bottles has severely affected companies that produce traditional cork. The invention of the machine for making plastic corks is an example of aNo ____ advancement.

a.
technological

b.
economic

c.
demographical

d.
market

e.
social and political