Select the option that expresses the given sentence in indirect speech.
The famous archaeologist said, "The ancient Egyptians built these pyramids around 2500 BC."
1
The famous archaeologist said that the ancient Egyptians built those pyramids around 2500 BC.
2
The famous archaeologist said that the ancient Egyptians had built these pyramids around 2500 BC.
3
The famous archaeologist said that the ancient Egyptians build these pyramids around 2500 BC.
4
The famous archaeologist said that the ancient Egyptians were building these pyramids around 2500 BC.