Task: Question Answering
Input (English): Problem: suppose that f ( x ) is a function such that for every real number x , i ) f ( x ) + f ( 1 - x ) = 10 and ( ii ) f ( 1 + x ) = 3 + f ( x ) . then f ( x ) + f ( - x ) must equal 
Options: a ) 7 , b ) 9 , c ) 10 , d ) 11 , e ) 12
Output (English): a