In a free election in 1989, Lech Walesa came to power in

A. Poland.
B. Hungary.
C. Romania.
D. East Germany.

Is it A?

Right.

A. Poland.

Yes, the correct answer is A. Poland.

To arrive at this answer, you can use your knowledge of historical events or you can conduct a quick search on the internet. In this case, you can search for "1989 election in Poland" to find information about the election and the rise of Lech Walesa to power. It's important to critically evaluate the sources and ensure they are reliable to get accurate information.