Considering both global export and import market dynamics, China has witnessed highest percentage change in its market share between 2000 and 2009 in the following product groups:

Percentage change in Integrated Circuits and Electronic Components imports for China from 2000-2009 = $$\frac{32.8-6.3}{6.3} \approx 400\%$$
Percentage change in Office and Telecom Equipment exports for China from 2000-2009 = $$\frac{26.2-4.5}{4.5} \approx 500\%$$
Percentage change in Integrated Circuits and Electronic Components exports for China from 2000-2009 = $$\frac{11.4-1.7}{1.7} \approx 550\% $$
Percentage change in Automotive Products imports for China from 2000-2009 = $$\frac{3.6-0.7}{0.7} \approx 400\% $$
Thus, Percentage change in Integrated Circuits and Electronic Components exports for China from 2000-2009 is the highest among the given options.
Hence, option  C is the correct answer.