Answer:
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.
The answer is the amputation of the lieutenant's arm. None of the other options are events in the story. The lieutenant returns home and we don't know the outcome of the battle. There is also no evidence he was ever ill.
