Which statements are true of a white dwarf?
a. it has a red shell.
b. it is the result of the core collapse of a low-mass star that sheds its outer layers.
c. it emits massive amounts of light compared with other stars.
d. it strongly attracts all matter or energy that comes near it.
e. it cools down to become a black dwarf.

Option B, It is the result of the core collapse of a low-mass star that sheds its outer layers.

Explanation:

Stars which reaches the end of their evolution process becomes a white dwarf. The diameter of white dwarf is 0.01 times the diameter of sun but their masses are equivalent to each other. Stars at the stage of white dwarf are short of fuel as they have burned up its entire hydrogen. This leads to slowing down of fusion process followed by collapsing of stars on their own.

hence, only option B is correct

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

hope this .. .