Preferably about 30 minutes a day
Answer:
The history of the light bulb is filled with rivalry, failures and great achievements. The electric light bulb has been called the most important invention since man-made fire. The light bulb helped to establish social order after sundown, extended the workday well into the night, and allowed us to navigate and travel safely in the dark. Without the light bulb, there would be no nightlife. However, creating a steady and affordable source of illumination was not as easy as many history textbooks suggest. The modern light bulb is the result of many innovators' work and continuous improvements over 150 years.
Explanation:
The correct answer is: [A]: "Scleroderma" .
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