Task: Question Answering
Input (English): Problem: maria sold 10 kg of apples in her first hour at the market , but only 2 kg of apples in the second hour . on average , how many kg of apples did she sell in two hours at the market ? 
Options: a ) 6 kg , b ) 5 kg , c ) 12 kg , d ) 24 kg , e ) 20 kg
Output (English): a