Dưới đây là các từ phù hợp để điền vào chỗ trống trong bài viết:

a. To **stabilize** the boat in rough sea, we redistributed the weight.

b. Between 1860 and 1900 the country had a number of revolutions and uprisings. It was a time of great **instability**.

c. The exchange rate is going up and down dramatically. It’s very **unstable** at the moment.