In horse racing, different horses are often assigned different weights to carry. in a particular race, the standard weight carried is 53 kg. the weight carried by each horse cannot differ by more than 4 kg from the standard. what are the maximum and minimum acceptable weights for a horse to carry in this race?
a 49 kg–57 kg
b 53 kg–61 kg
c 51 kg–55kg
d 45 kg–53 kg