If k, (k+200), (k+350), and 15*K are all multiples of D, then D could equal which of the following ?  Select the correct option
A) 20  B) D=25  C) D=75  D) 100  E) 150
{Multiple of D} - {Multiple of D} = {Multiple of D}.   (K+200) - k = 200 = {Multiple of D}.   (K+350) - k = 350 = {Multiple of D}.   Both 200 and 350 are multiples of only option B.   Answer: D=25.
<result>B</result>
If k, (k+200), (k+350), and 15*K are all multiples of D, then D could equal which of the following ?