【单选题】
A <{p}>The request can hold multiple devicelP / deviceld objects as a list<{br/}><{/p}>
B <{p}>The square brackets introduce an optional part of the request<{br/}><{/p}>
C <{p}>The square brackets aid readability but are not mandatory<{br/}><{/p}>
D <{p}>The devicelP / deviceld object is a nested object inside another one, with nesting requiring the use of square brackets<{br/}><{/p}>
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