IMO A
Stmt1: The market value of the car depreciates 20% every year. So, 2 year back, the market value was = 6000*(1-1/5) ==> 6000*4/5 ==> $4800. One year back the market value was = 4800*4/5 ==> $3840. This year the market value is = 3840*4/5 ==> $3072. Sufficient.
Stmt2: Firstly, I don't like the way this statement is constructed. How am I to assume the same year the car was manufactured? When dealing with DS question, each statement should be dealt with separately. This statement is tempting me to bring information from Statement 1 (which is not correct). Clearly, this statement is not sufficient because I do not know which year the statement is talking about & I also do not know what the depreciation value of the car is or the original price of the car. With no such details, this statement is not sufficient.