Under Article IX-A, Section 7, each Constitutional Commission shall decide any case or matter brought before it within how many days from the date of its submission for decision?

The correct answer is B. 60 days

Article IX-A, Section 7 requires each Commission to decide, by a majority vote of all its Members, any case or matter within sixty days from its submission for decision or resolution. Its decisions may then be brought to the Supreme Court on certiorari within thirty days.