Looking at the first 3 minutes of the reaction for each set of the pH trials, which pH appears to have the fastest reaction rate? (You could look at the slope of the line to determine reaction rate.)

Ithink option a is correct because you cannot donate a different blood group than yours because it won't match.option a says betsy can donate to mark. they have the same blood group so donation can happen.

Nitrate poisoning for the first onebaby blue syndrome

Idont know but good luck; )