Handicaps
Answer: Option A.
Explanation:
Hindrances means the obstacles or the hurdles which might come in the way of achieving a particular goal or objective in the working of a particular process or in life of a person.
In this excerpt, the word hindrances mean the handicaps, the troubles, the problems that Harrison Bergeron had to go through in his life and the difficulties he had to face to in his life, like the mental handicap that he had to suffer from.