1. he said he was an aerospace engineer
2. she says she works in the National History Museum
3. the Doctor said their son studies at university
4. the Astronaut said they are in space
5. He says he teaches physics to his friend
6. Mother says she loves the youngest girl
The first choice is the right answer, that Polonius is sacrificing his daughter to trick Hamlet. This is when Polonius is convinced that Hamlet is lovesick over Ophelia, and when Hamlet calls him Jephthah, he fixates on the mention of his daughter, and neglects the context of Jephthah having sacrificed his daughter.
