Given the equation e=-g^4, which of the following must be true?
I. If g is negative then e is negative.
II. e is negative.
III. g is non-negative.	Choose the correct choice from the following answers.
A) II only	B) I only	C) II and III only	D) III only	E) I and II only
If e=-g^4, which of the following must be true?   First of all notice g^2 is always non-negative, so -g^2 is non-positive (zero or negative), which means that e is zero when g=0 and e is negative for ANY other value of g.   I. e is negative --&gt; not necessarily true, if g=0 then e=-m^2=0;   II. g is non-negative. g can take ANY value: positive, negative, zero. We don't have any restrictions on its value;   III. If g is negative then e is negative. m is negative means that m is not zero.   Answer: I only (I only).
<result>B</result>
Given the equation e=-g^4, which of the following must be true?
I. If g is negative then e is negative.
II. e is negative.
III. g is non-negative.