A: """

B: "I"

C: SyntaxError

D: undefined

A: NaN

B: 20

C: ReferenceError

D: undefined

A: { default: function default(), name: "Lydia" }

B: { default: function default() }

C: { default: "Hello world", name: "Lydia" }

D: Global object of module.js

A: "class"

B: "function"

C: "object"

D: "string"

A: [1, 2, 3, 4, 5]

B: [1, 2, 3, 5]

C: [1, 2, 3, 4]

D: Error

A: name Lydia and age 21

B: ["name", "Lydia"] and ["age", 21]

C: ["name", "age"] and undefined

A: ["banana", "apple", "pear", "orange"]

B: [["banana", "apple"], "pear", "orange"]

C: ["banana", "apple", ["pear"], "orange"]

D: SyntaxError

A: a is bigger, 6 and b is bigger, 3

B: a is bigger, undefined and b is bigger, undefined

C: undefined and undefined

D: SyntaxError

A: "Lydia"

B: "Sarah"

C: Error: cannot redeclare Person

D: SyntaxError

A: {Symbol('a'): 'b'} and ["{Symbol('a')"]

B: {} and []

C: { a: "b" } and ["a"]

D: {Symbol('a'): 'b'} and []