If |m+5|−5 = m, which of the following must be true?  Options.
A) m = 0  B) m = −10  C) m is a multiple of 5.  D) m ≥ −5  E) |m+5| > 0
Case 1 : |m+5| = 0, then m= -5   |-5+5|−5 = -5 --&gt; true   Case 2; |m+5| &lt; 0, then m&lt; -5   |m+5|−5 = -m - 5 -5 = m , then m = -5 --&gt; false   Case 3: Case 2; |m+5| &gt; 0, then m&gt; -5   |m+5|−5 = m+5 -5 = m , then m = m --&gt; always true   Only case 1 and 3 satisfy the equation, so m ≥ −5 is the answer.
<result>D</result>
If |m+5|−5 = m, which of the following must be true?