Question 1 (2 points) The following statements are related to the background process in Unix. Which one is incorrect? O a) If a program executes in background, the output of the program would not be displayed in screen b) To run a process in the background, we should put the special character & at the end of command O c) If a program executing in background attempts to read from STDIN, it is terminated O d) Background process can start a new subshell