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(A)Assist
(B)To assist
(C)Assisted
(D)Being assisted

從文義來看，這句應該是

為了協助調查員的「全球衛生大挑戰」計畫， 辛格和雷弗瑞女士及其同事正在提供有關發展中國家研究倫理，社會和文化問題的諮詢服務。

To assist Grand Challenges in Global Health investigators, Drs. Singer and Lavery and their colleagues are providing advisory services on ethical, social, and cultural issues related to research in the developing world.

所以選「To assist」；選A、C則在本文中，句子不完整；選D與語境不符，計畫不會主動幫助人。

To best ensure successful completion完成；結束 of large-scale research projects and the appropriate adoption of technologies that arise from起于,由出身 their projects, investigators working in global health must pay attention not only to science, but to the ethical道德的；倫理, social, and cultural issues that surround their work.

These ethical道德的；倫理, social, and cultural concerns have become increasingly important to the success of projects 6in the developing world, including many of the projects funded by Grand Challenges in Global Health. 7Grand Challenges in Global Health investigators, Drs. Singer and Lavery and their colleagues are providing advisory給予意見的 services on ethical道德的；倫理, social, and cultural issues related to research in the developing world.

In addition, their project aims to help foster養育 the successful and appropriate adoption領養，收養, 開始, 接受 by communities社區  8 technologies that result from Grand Challenges in Global Health projects.

The project team’s advisory給予意見 service for Grand Challenges investigators is in place在適當的位置, and work has begun to plan for the successful adoption of technologies that may 9 from Grand Challenges in Global Health projects. The project team is currently conducting two global case studies, one on community engagement安排, 約定 in research in the developing world and 10 on commercialization商業化，使商品化 of health products in low-resource settings.

The case studies will identify good practices in both areas.