Which sentence does not contain any errors in comma usage?. . A. If you ever go to San Antonio, Texas, be sure to visit the Alam
o.. . B. The Grand Canyon is just north of Flagstaff Arizona. C. As of June 9 2002, my office is located at 240 Luray Avenue, Front Royal VA 22630.. . D. My father's birthdate is October 3 1972.
i'm not sure what the question is. If it is to correct the grammar given, then it would be Mario and Judith <u>a</u><u>r</u><u>e</u><u> </u>studying for <u>a</u><u>n</u><u> </u>upcoming science exam.