A woman used to be really fat. She used to weigh 115 kg. So she decided to lose weight. She exercises so hard that she really loses a lot. During the first month, she lost 12kg. She had lost 19 kg by the end of the second month. And during the third month, she lost another 6kg. How heavy was she at the end of the third month?
A、78kg.
B、84kg.
C、90kg.
D、97kg.
