Which of the following statements regarding Boeing is NOT true?

a$.$ Boeing's enormous global supply chain delivers more than a billion parts and subassemblies to Boeing plants every year.

b$.$ Almost half of the world airline fleet consists of Boeing airplanes.

c$.$ Boeing has found partners in over a dozen countries.

d$.$ Boeing products include both commercial and military aircraft.

e$.$ Boeing strategically does not buy components from China due to WTO regulations.