Adaptarse

Adaptarse
 

adaptarse a los nuevos tiempos
(to change with the times)

Hi ,
If I wanted to re-write the expression above, would all three below be grammatically correct?
1. cambiar con el tiempo
2. acostumbrarse a las nuevas situaciones
3. si la época cambia, ellos también tienen que cambiar

All your three sentences are grammatically correct, although I find your third option closer to the original meaning. "Adaptarse" here means to change and modify your behaviour according to the new fashions, ways, usages, customs,...