Which phrase correctly completes the second sentence?

Ce magazine de santé est mon préféré. Je le mois dernier.
A.
l’achète
B.
les achète
C.
l’ai acheté
D.
les ai achéte

Translate to french: hi émilie! right now i am at the zoo. there are lots of animals here. in one part of the zoo, there are brown bears. they seem very tired. next, i see a tiger! there are two tigers, and they are both running. over here, there are elephants. the baby one is cute. in this building, they have snakes. some snakes are green, some are black, but they are all long. there are also frogs here. they can jump very high! goodbye émilie!