According to Heidegger's Approach,what Might We Learn About Technology If

According to Heidegger's approach,what might we learn about technology if we experience a power cut?

A) That energy is dependent on the capacity to pay to use it,which means some social groups are better able to consume technologies than others
B) That technologies are a product of society,and as such something which individuals and groups create for the benefit of the masses
C) That we only really realise our dependence on technologies when they fail
D) That technologies will never be superior to natural processes