The MD told us about the new project.

The correct answer is: A. We were told about the new project by the MD.

The other options are incorrect because they do not use the correct tense.

• B. We are told about the new project by the MD. This option uses the present tense, which is incorrect because the MD told us about the new project in the past.
• C. We told by MD about the new project. This option uses the passive voice, which is incorrect because the MD is the one who did the telling.
• D. We had been told by MD about project. This option uses the past perfect tense, which is incorrect because the MD told us about the new project in the simple past tense.

In conclusion, the correct answer is: A. We were told about the new project by the MD.