The best answer to go with is b
Answer:
washboard, De Geer, push, ice-thrusted
<span>Depending on the class that your letter went, it could take two days or one week. Traditionally, first class mail almost the next day.</span>
Explanation:
Germany's condition of reduction of population is because of pandemic effect on global recolation.
Positive:There would not be much pandemics, diseases,& so on.
Negative: There would be an effect on economy, there'll be few or less workers,so on.(This would be a larger effect than the positives of course)
One reason of undergrowth is of jobless rate & bare utilisation anticipation.

I think this is the answer.