Awoman accused of a crime is testifying in court. how does the fifth amendment protect her?

a. if she is convicted, she can be tried again for the same crime.
b. her freedom of speech means that she can say whatever she wants.
c. she cannot be questioned by an attorney.
d. she is not required to answer questions that would force her to confess to a crime.

The correct answer for above statement is:

The Fifth Amendment guards you upon self-incrimination (cannot be constrained to affirm upon oneself), authenticates the need of the Grand Jury, guards you against being put twice in danger of wasting life or limb (double jeopardy), preserves your equity to procedural and substantive due process .So in that case she don't need to answer any question of confessing.