Which expression is equivalent to −2.1+(−5.9)+(−3.7) ?−2.1−(5.9+3.7)(2.1+5.9)+(−3.7)(2.1+5.9+3.7)−(2.1−5.9)+(−3.7)

The last one because they all have negatives in front of them so when you fool the 2.1 back and solve you get the same answer as the problem given