The last option ,KH and LM
A problem with extra information will be difficult to solve because you may not be able to tell what information you might need to use for the problem.
Well this factor has to the answer b.) hope I helped.
To convert any unit to it's "milli-" form always multiply the given value by 1000. The new value will be the value of in the "milli-" form.
The question asked to us is to convert 3.521 g to mg (or milligram). Thus, all that we need to do is to multiply 3.521 with 1000 and we will get the corresponding value in milligrams. Thus, in mg, 3.521 g is:
mg