Given a main function and the inputting mode as follows, the correct input statement in the function should be() main() { int a; float f; printf("input number: "); printf("\nf=%f, a=%d\n, f, a); } Input numbers: 4.5 2 A. scanf("%d, %f", &a, &f); B. scanf("%f, %d",&f,&a); C. scanf("%d%f", &a, &f); D. scanf("%f%d", &f, &a);