Task: Question Answering
Input (English): Problem: the area of circle o is added to its diameter. if the circumference of circle o is then subtracted from this total, the result is 4. what is the area of circle o ?
Options: ['a. 2 / π', 'b. 2', 'c. 8', 'd. 4', 'e. 4 π']
Output (English): e