单选题：阅读下列文章，回答问题：Read the article from the Chairman’s statement i

阅读下列文章，回答问题：Read the article from the Chairman’s statement in a pharmaceutical company’s annual report
　　Choose the correct word to fill each gap from (A, B, C or D) on the opposite page .
　　For each question 21-30,mark one letter (A, B, C or D) on your Answer Sheet .
　　There is an example at the beginning , (0)
　　Charman’s Statementwww.233.com
　　Two year ago we undertook to increase our sales and to at least (10) our earnings. We published this (21) in order to demonstrate our resolve to lead the business successfully through the demanding period following the expiry of patents which had given us the exclusive right to develop two of our major products.
　　I am very please to (22) that we achieved what we set (23) to do. We have achieved increased of 4% and 6% in sales and earnings (24) this comes despite considerable losses (25) the expiry of the patents. It is testimony to the depth and vitality of our portfolio of medicines that we have been able to survive the largest single patent expiry our industry has known.
　　Looking further ahead, I firmly believe that this company can continue to deliver strong , sustainable growth, enabling us to stay at the (28) of the research-based pharmaceutical industry.
The power and pace of technological and scientific development, combined with economic and social pressures, are (29) huge changes in our industry, the successful companies of the future will be those that anticipate and (30) to this change, integrate new technologies effectively, and are closest to their customers. I have full confidence in our ability to remain a major player in our industry. A．warranty
B．obligation
C．commitment
D．contract