Let \( x \) be the number of games Ahmadullah's basketball team played last season. According to the problem, they are playing 21 games this season, which is 12 games more than last season. We can set up the following equation based on the information given:
\[ 21 = x + 12 \]
To solve for \( x \), we subtract 12 from both sides:
\[ 21 - 12 = x \]
\[ 9 = x \]
So, the team played 9 games last season. However, this answer does not match any of the given options. Therefore, it seems there may be an error in the problem or the options provided. Given the available options, none of them are correct based on the calculation done above.
Would you like to double-check the problem or explore further options?