Which do you think will penetrate farther into a block of lean, x-rays or gamma rays? explain your reasonings.

I dont know if you mean lead instead of lean .
anyway i think gamma rays will penetrate further 
this is because gamma rays are very penetrating , they have a shorter wave lenght than X-rays because the energy which produced them is greater . 
Although both are similar but X-rays will become weaker and less penetrating when passing through a block of lead unlike the gamma rays eventhough it might reduse their intensity  > but both will never stop ! . 
This is a hard question!!  'cause both are similar but as i said i think gamma rays will penetrate further 

The answer will be d. reflects light because it cant be all the others because light cant be other things other than light

The answer is a 0.64 volts