Calcium and magnesium dissolved in water are the two most common minerals that make water "hard." The degree of hardness becomes greater as the calcium and magnesium content increases and is related to the concentration of multivalent cations dissolved in the water.
Answer:
Option <u>a</u><u>)</u><u> </u><u>185</u><u>0</u><u> </u>is the right option
<span>Pathological lying is one of the hallmark characteristics of a narcissist. They lie out
of their need to manipulate and control. They must lie in order to create their false "reality" about themselves that they project out to the world.</span>
