What did Eastern and Western societies have in common during the Age of Discovery?

They both have a storied and colorful history of the dramatic arts.
They both practiced democratic forms of government.
They were both actively exploring Greenland and Iceland.
They both had majority Muslim populations as a result of trade.

My answer is d

3 answers

Is that what your assigned reading says?
Your reading assignment should clarify these things for you:

~ What centuries are considered the "Age of Discovery"?
~ Which countries or cultures were considered "Western" during that time?
~ Which countries or cultures were considered "Eastern" during that time?

Once you are clear on those things, you should be able to make a decision.
The correct answer is A