Answer:
It can't be C or D. I think it could be A.
Five hundred six thousand seven hundred nine.
So what you do is see all the denomenators and factor them (denomenaotrs are the bottom numbres)
10,4,10,25
10=2 times 5
4=2 times 2
10=2 times 5
25=5 times 5
we need to include all of them so we need at leas two 2's, and two 5's
2 times 2 times 5 times 5=100
leact common denomator is 100
That would not be right because 4 times 3 equals 12 and -6 times 3 equals -18.
