A product has three componets, A,B, and C, with reliabilities of 0.95, 0.98, and 0.995. Engineers intend to put a redundant component A that has reliability 0.70. With this change, system reliablity will:
a)fall by 20%
b)fall by 10% or less
c)rise
d)cannot determine from the above information
e)none of the above