#include " 16F877A.h" #use delay(clock = 4000000) #int_ext void f() { output_D(255); delay_ms(1000);} void f2() { output_D(15); delay_ms(1000);} void main() { If no interrupt occurs, what will be the output on portD? int x; A. 15 B. 255 C. 255 15 D. 255 to 0 E. 0 to 256 F. 0 to 255. enable_interrupts(int_ext); enable_interrupts(global); ext_int_edge(H_TO_L); while(1) output_D(x); x + +; delay_ms(100);} } e ACADEMIC TISA