A They are combined in an array and stored in the appropriate superglobal array
B The value of the second element is added to the value of the first in the appropriate superglobal array
C The value of the second element overwrites the value of the first in the appropriate superglobal array
D The second element is automatically renamed
E PHP outputs a warning
+ ExplanationPHP simply adds elements to the appropriate superglobal array as they are retrieved from the query string or POST information. As a result, if two elements have the same name, the first one will just be overwritten by the second. Therefore, Answer C is correct.