6) Using the rules for significant figures, the sum of 0.027 gram and 0.0023
gram should be expressed as
A) 0.030 gram B) 0.0293 gram C) 0.029 gram D) 0.03 gram
I need help

C) the increase in atmospheric pressure pushes the walls of the balloon outward thus making it  is the answer.hope i you.

Answer it was we, the the whole people, who formed the union. and we formed it, not to give the blessings of liberty, but to secure them: not to the half of ourselves and the half of our posterity, but to the whole people- women as well as men.