colonialism created artificial countries with major ethnic divisions and unstable political systems. many countries have had histories of secessions, revolts, and coups due to tribal and ethnic conflicts.
the answer is...1,199
7 is a prime number and the only factors are itself and 7. since neither 34 nor 43 are divisible by 7, that leaves 1 as the only remaining common factor.
a. they both have natural barriers like the pacific ocean that isolate them form other regions