Is the passage of dialogue written correctly or incorrectly?

"The news reporter said the parade has been postponed," Holly announced.

"Then we can go to the park instead," Cory suggested.

"I'll pack a cooler with food," Brianna said. Then she added, "This will be a lot of fun."

A. incorrectly

B. correctly

The passage of the dialogue is written:

B. correctly

Punctuation such as quotation marks which highlight the speech; comma is put at the right place which includes the emphasis of two different ideas; and period is also correctly placed every after the end of the sentence. Lastly, page breaks are correctly implemented.