Question

which development would best serve as a turning point between two historical periods?
a. a historian discovers artifacts that offer new information about a historical figure.
b. a business publishes a report describing its efforts to reduce its environmental impact.
c. a countrys leader hosts a conference to discuss changing international trade agreements.
d. an inventor creates a new technology that revolutionizes an important industry.

Explanation:

A turning point in history is an event that significantly changes the course of events. An invention that revolutionizes an industry (Option D) would have a wide - reaching impact on the economy, society, and potentially other aspects of life, marking a clear shift between historical periods. Discovering artifacts (Option A) may add to knowledge but not necessarily be a major turning point. A business report (Option B) is more of a corporate communication. A conference (Option C) may lead to changes, but an actual revolutionary technology (Option D) is more likely to be a clear - cut turning point.

Answer:

D. An inventor creates a new technology that revolutionizes an important industry.