Task: Question Answering
Input (English): Problem: each year for 4 years , a farmer increased the number of trees in a certain orchard by 1 / 4 of the number of trees in the orchard of the preceding year . if all of the trees thrived and there were 3125 trees in the orchard at the end of 4 year period , how many trees were in the orchard at the beginning of the 4 year period . 
Options: a ) 1287 , b ) 1285 , c ) 1283 , d ) 1280 , e ) 1281
Output (English): d