Which of the following choices is not a way by which we can study the inside of the Sun? We

Which of the following choices is not a way by which we can study the inside of the Sun?
We can send a space probe into the Sun’s photosphere.
We can probe the interior of the Sun by studying the vibrations in its photosphere.
We can study solar neutrinos.
We can make a computer model of the Sun’s interior that allow us to predict the observable properties of the Sun.