A not$-$for$-$profit university maintained an endowment of $$400,000,$ the income of which was restricted for an annual conference on international relations. In a particular year, the fair value of the endowment increased by $$40,000.$ The university held a conference on international relations at a cost of $$43,000.$ The university should report

a$.$ no revenue and expenses without donor restrictions of $$43,000.$

b$.$ revenues without donor restrictions of $$40,000$ and expenses without donor restrictions of $$43,000.$

c$.$ revenues with donor restrictions of $$40,000,$ expenses with donor restrictions of $$40,000$ and expenses without donor restrictions of $$3,000.$

d$.$ revenues with donor restrictions of $$40,000$ and expenses without donor restrictions of $$43,000.$