Mir Kasim became the Nawab of Bengal with the help of the English, but why was Mir Jafar reinstated later on?

a. Mir Jafar brided the English heavily and made them remove Mir Kasim
b. Mir Kasim opposed the religion conversion of the natives by the English
c. Mir Kasim fought with the English as they were flouting the internal trade laws, causing heavy loss to his income
d. The English felt that Mir Kasim had joined hands with the Mughal Emperor to oust the English from India