1. She had broken the record by two days.
2. the record (of "running/racing") to India
break the record+by+各種可以break的對象(時間,長度等等),這是固定搭配。
the record 後面本應有後置定語running/racing to India,但是由於前後句意清晰,於是省略了表示動作的分詞,但還是to India保留了下來,便於理解。遺憾的是由於句法的省略和添加,確實增加了非母語人士的理解!
那麽如果'she landed in India six days later',答案應該是D