What Is the Rationale Surrounding the Doctrine of Charitable Immunity

What is the rationale surrounding the Doctrine of Charitable Immunity?

A) State legislatures are more lenient toward select specialty areas of medicine with regard to excessive legal damages.
B) Courts provide immunity from excess liability for nonprofit organizations.
C) Blood collecting facilities entice donors by agreeing to donate 5% of plasma revenues to their favorite charity.
D) None of the above