Bob and Linda went mountain climbing together. They climbed the mountain from $8$:$30$. Bob reached the top at $14$:$00$, and Linda was $1$ hour and $40$ minutes behind him. How long did it take Linda climb?~(adapted from 2003 Math Kangaroo Problem, Level 3 - 4, Question \#10) 
选项为:A:$3$ hr $30$ min  B:$4$ hr $30$ min  C:$7$ hr $10$ min  D:$6$ hr $20$ min  E:$8$ hr $40$ min  请回答其中一个选项.