Sorry but i can not decide i think it is B or C
Using formula:
-(1)
where w is weight of object,
m is mass of the object, and
g is the acceleration of gravity.
mass, m = 6 lbm (given)
acceleration of gravity, g =
(given)
Now, substituting the values in equation (1):

Since, 
So, 

Hence, the mass of an object is 5.976 lbf.
Explanation:
When a chlorine atom forms an ion, it gains electrons, making it negative. A neutral chlorine will become a chlorine with a -1 charge. When it gains an electron, the radius increases.
When a sodium atom forms an ion, it loses electrons, making it positive. A neutral sodium will become a sodium with a +1 charge. When it loses an electron, the radius decreases.