The technological improvement that led to the era of European exploration is D. new instrument to observe the stars and navigate ships.
<h3>How to explain the information?</h3>
The exploration by the Europeans was believed to start from the 1400s and continued through the 1600s.
Some of the reason why the Europeans started the exploration of world through the sea in their quest and search for new trading routes, wealth, knowledge, dominance etc.
The European also believed they are in need to spread their religion to other places of the world.
Therefore, the technological improvement that led to the era of European exploration is new instrument to observe the stars and navigate ships.
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