Select the correct direct form of the given sentence.
The teacher told us that we all were intelligent children but were not sincere in our work.

A

The teacher said to us, "You all were intelligent children but were not sincere in your work."

B

The teacher said to us. "We all are intelligent children but are not sincere in our work."

C

The teacher said to us, 'We all were intelligent children but were not sincere in your work."

D

The teacher said to us, "You all are intelligent children but are not sincere in your work."