Question 37: Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the questions following: Population growth rates vary among regions and even among countries within the same region.
remain unstable: unstable
restrain: to prevent, to restrain
stay unchanged: unchanged
The rate of population growth varies between regions and even between countries within the same region.