The invention of the steam engine impacted industry in a variety of ways, not the least of which involved the European exploration and colonization of the African continent. Transportation, in general, was improved, proving profitable to businesses which could now transport products easier and faster. Another change of importance involves the location needed for factories, which no longer needed close proximity to rivers for energy.
Whilst Liberalism is founded on ideas of freedom, equality and liberty. Social Democracy is the best balance of freedom and equality because it promotes social justice in a capitalist economy and a liberal democratic view. Also, communism has, historically, a poor reputation for freedom and equality. For example, China and North Korea are current communist countries and Russia previously was a communist country after the Bolshevik Revolution in 1917.
I think it’s A, i’m not 100% sure so let me know if it’s right or wrong