Task: Question Answering
Input (English): Problem: a worker earns $ 20 on the first day and spends $ 15 on the second day. the worker earns $ 20 on the third day and spends $ 15 on the fourth day. if this pattern continues, on which day will the worker first reach a net total of $ 100 ?
Options: a. 30, b. 33, c. 35, d. 38, e. 40
Output (English): b