The table shows statistics for four countries, A–D. country average annual growth rate of population (%) population density (per square kilometre) life expectancy (years) real GDP per head ($) A 1.9 19 46 190 B 2.7 2 58 1700 C 3.7 45 59 210 D 4.2 89 44 190 Which country has the lowest standard of living?

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