Obviously, we need to solve each of the expression on a piece of paper to figure it out. I checked it out and this is what I got....
((((−12)(12))(−6.3))(−0.2))(−15.9)
=(((−144)(−6.3))(−0.2))(−15.9)
=(907.2)(−0.2)(−15.9)
=(−181.44)(−15.9)
=2884.896
Thats the first option. It came out Positive! :)
(12)(12)(6.3)(0.2)(−15.9)
=(144)(6.3)(0.2)(−15.9)
=(907.2)(0.2)(−15.9)
=(181.44)(−15.9)
=−2884.896
Thats the second option, it came out negative.
(12)(−6.3)(−0.2)(−15.9)
=((−75.6)(−0.2))(−15.9)
=(15.12)(−15.9)
=−240.408
Thats the third option, it came out negative
(((((−12)(12))(−6.3))(−0.2))(−15.9))(0)
=((((−144)(−6.3))(−0.2))(−15.9))(0)
=(907.2)(−0.2)(−15.9)(0)
=((−181.44)(−15.9))(0)
=(2884.896)(0)
=0
Thats the fouth option, it came out as Positive zero.
..................................................................................................
I hope you are solving this with me right now ! Now YOU tell me what you think the answer is. Those are enough clues :)