I think it is B, because the sun’s size is pretty average
Answer:
The value is 
Explanation:
From the question we are told that
The electric flux is 
Generally the net charge is mathematically represented as

Here
is the permetivity of free space with value

So

=> 
It should be at about 65J. Not sure, hope I helped.
A testing instrument that's used to measure electrical signals
in a circuit and display them as waveforms on a screen is called
an oscilloscope.