下列程序的运行结果是_________(2分) #include<stdio.h> intmain() { int a, b, c; a = 20; b = 30; c = 10; if (a < b) a = b; if (a >= b) b = c; // C语言中’>=’意即’≥’ c = a; printf(“a = %d, b = %d, c = %d”, a, b, c); return 0; } A. a = 20, b = 10, c = 20 B. a = 30, b = 10, c = 10 C. a = 30, b = 10, c = 30 D. a = 30, b = 10, c = 20