Which of the following methods uses familial reference to loop through a collection of child nodes?
A. for (var n = node.firstChild; n !== null; n = n.nextSibling) {commands}
B. for (var n = node.firstChild; n !== null; n = n.previousSibling) {commands}
C. for (var n = node.firstChild; n !== null; n = n.firstChild) {commands}
D. for (var n = node.firstChild; n !== null; n = n.lastChild) {commands}
Answer: A
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