Use WestlawNext Campus Research to answer the following questions:
a. What is subchapter B of title 26, subtitle A, chapter 1 of the Code of Federal Regulations?
b. What I. R. C. section covers the inclusion of the rental value of parsonages?
c. What is the key number for medical deductions?
d. In the Hargrove case, why was certiorari granted by the Supreme Court in 2010?