Computers - A PHP "variable variable" takes the value of a variable and treats that as the name of a variable. For example, if `$var` is a variable then `$$var` is a variable variable whose name is the value of `$var`. Which script produces the output below, using variable variables? ```plaintext Cat Dog Dog ```

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A PHP "variable variable" takes the value of a variable and treats that as the name of a variable. For example, if $var is a variable then $$var is a variable variable whose name is the value of $var. Which script produces the output below, using variable variables?

Cat
Dog
Dog

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: ```PHP

$N_M_

=

"C_T";

$$N_M_

=

"D_G";

_CH_

$N_M_

.

"<BR/>";

_CH_

$$N_M_

.

"<BR/>";

_CH_

$C_T; ```