The correct option is D The dynasty grew because it had powerful leaders who focused on growing their presence all over the country by defeating foreign powers.
The Satavahana dynasty had powerful leaders, like Gautamiputra, who focused on growing their presence all over the country by defeating foreign powers. After the reign of Gautamiputra, the Satavahana dynasty continued to prosper for a while. Later, it declined and by around 200 CE the dynasty was reduced to a regional power while other kingdoms rose to power in the South.