Let me say something.
You should choose a.
Let me analyze:
Meeting and meeting have different meanings. Meeting is an unexpected encounter; Meeting is meeting. The two have different connotations and are not repeated when used together. Put together, you can understand it according to the context, and each has its own emphasis. Can be tied.
B lack of ingredients. The number of patent applications in China is increasing year by year, and the sustained and rapid growth of patent applications should be: the number of patent applications in China is increasing year by year, and the number of patent applications is growing continuously and rapidly.
C is broken. The remaining small part is also shrinking at the rate of 10% every year, because the remaining small part is also shrinking at the rate of 10% every year.
D subject-predicate mismatch. Grammatical component analysis: [The (attributive)] research project [plan (adverbial)] [compile [adverbial]] into a book. Extracting the backbone should be compiled into a book for the research project. The project should not be the executor of compilation. The subject should be the biologists who make up these projects. Biologists from more than 20 countries participating in the "Encyclopedia of Life" research project plan to compile all the information of 6,543,800+8,000 known species in the world. Or: members of the research project group of "Encyclopedia of Life" composed of biologists from more than 20 countries plan to compile all the information of 6,543,800+8,000 known species in the world into a book.
Personal opinion, welcome to discuss.