With a grave face and determined mind she walked into the meeting to deliver the bad news based on the contents of this sentence what does the word grave mean

From “the carolina way” what is the following quote an example of? “ i made them understand that our plan would fall apart if they didn’t take care of one another: set screens; play team defense; box out; pass to the open man.” a. cultural context b. shared value c. historical context d. universal theme