Circulatory system controls all of your actvity and it transfferes blood to your brain so you wont have a stroke
Girls: in between 8 and 13
Boys: in between 9 and 14
It doesn’t specify what gender I’d go with answer B
In all of the cases that I've seen it is usually subtractive, but most of the time it depends on how old the child is.
Jeff would have saved $2.40 if he bought the shirt on tuesday at 75% off.