To apply the sales comparison approach for setting hotel rates, we observe rates of four hotel rooms with different attributes (1: A, B, C, D, E - RMB600; 2: B, C, D, F - RMB600; 3: B, C, D, E - RMB500; 4: B, C, D - RMB400). What is the value of attribute A?
A.100
B.50
C.150
D.200
正确答案：A