It is nighttime where Candice lives, so
A.
she will be able to see half of the Sun in the sky.
B.
she will be able to see both the Sun and the Moon in the sky.
C.
she will not be able to see the Sun in the sky.
D.
she will be able to see the Sun in the sky.

C. She will not be able to see the Sun in the sky.

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.