In LISP, the function (minusp (-20 4 8 8 1) returns A. T B. F C. NIL D. -20 E. None of the above

The correct answer is A. T.

The function (minusp (-20 4 8 8 1)) returns T because the result of the expression (-20 4 8 8 1) is negative.

The function minusp takes two arguments and returns T if the first argument is less than the second argument, and F otherwise. In this case, the first argument is -20 and the second argument is 1. Since -20 is less than 1, the function returns T.

The other options are incorrect for the following reasons:

• Option B: F is returned if the first argument is not less than the second argument. In this case, the first argument is -20 and the second argument is 1. Since -20 is less than 1, the function does not return F.
• Option C: NIL is returned if the first argument is equal to the second argument. In this case, the first argument is -20 and the second argument is 1. Since -20 is not equal to 1, the function does not return NIL.
• Option D: -20 is the first argument to the function. The function does not return the first argument.
• Option E: None of the above is the correct answer.