选择篇(018)-下面代码的输出是什么?
let c = { greeting: 'Hey!' }
let d
d = c
c.greeting = 'Hello'
console.log(d.greeting)
A: HelloB: undefinedC: ReferenceErrorD: TypeError
参考答案：
let c = { greeting: 'Hey!' }
let d
d = c
c.greeting = 'Hello'
console.log(d.greeting)
A: HelloB: undefinedC: ReferenceErrorD: TypeError
参考答案：
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