Choose the most appropriate option to change the narration (direct / indirect) of the given sentence.
Her mother said, “We must have a party to celebrate your promotion.”

A

Her mother said that they must have a party to celebrate her promotion.

B

Her mother said she had been planning a party for celebrating her promotion.

C

Her mother says that they should plan a party to celebrate her promotion.

D

Her mother told that they would be having a party to celebrate her promotion.