After a user-interrupt sets the int_flag to TRUE, how can it be reset to FALSE?

After a user-interrupt sets the int_flag to TRUE, how can it be reset to FALSE?
A . by INFORMIX-4GL after 1 second has elapsed
B . by executing the DEFER INTERRUPT statement
C . only if the application code resets it to FALSE
D . by INFORMIX-4GL after the IF int_flag statement is executed

View Answer

Answer: C