FOR DECLARING A CHILD ELEMENT 'MESSAGE' TO OCCUR ZERO OR MORE TIME...

75. For declaring a child element 'message' to occur zero or more times

inside the 'note' element, identify the correct syntax

a) <!ELEMENT element-name

c) <!ELEMENT element-name

(child-name+)>

(child-name*)>

b) <!ELEMENT element-name

(child-name?)> d) <!ELEMENT element-name