Which procedures were followed in this lab to decrease experimental error? Check all that apply.

repeating the experiment three times for each temperature
changing the volume of solution during each step
using three different temperatures instead of only two
using different types of antacids with different chemical formulas
using three different surface areas instead of only two

repeating the experiment three times for each temperature

using different types of antacids with different chemical formulas
using three different surface areas instead of only two