So,
Based in the equation:
Where E represents the energy, c represents the speed of light, which is 3x10^8 m/s and m represents the mass of a body.
We can say, that:
1. A small amount of mass can be converted to a large amount of energy.
That's because if you notice, the value of c is constant and it's really big. So, if we have a small amount of mass, it can be converted to a large amount of energy since we multiply it by a big number.
3. "c" represents the speed of light, which is 3x10^8 m/s.
I'm not too sure of options 2, 5 and 6, so you should ask these to other tutor.
Options 1 and 3 are true.