Tony and Caroline are trying to solve the following system. Tony says to multiply the first equation by 4. Caroline says to multiply the first equation by 2. Which student's first step will work toward eliminating a variable?
A:Only Tony's idea will work toward eliminating a variable.
B:Only Caroline's idea will work toward eliminating a variable.
C:Neither of these will work.
D:BOTH ideas will work toward eliminating a variable.