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