What does the String data type hold in Rust?

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Question:What does the String data type hold in Rust?

1.a pointer to the memory where String resides and its capacity

2.a pointer to the memory where String resides, a length, and a capacity

3.a string value and its length

4.a string value, a length, and a capacity

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  1. What does the String data type hold in Rust?
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