Final answer:
Missions leaders in 1953 showed a shift by adding humanitarian goals to their evangelism efforts, focusing on improving living standards and education alongside religious teachings.
Step-by-step explanation:
The shift in thinking among missions leaders in 1953 can be illustrated by their increased emphasis on adding humanitarian goals to the list of evangelism goals. This transition involved assistance in the improvement of living standards, education, and healthcare rather than focusing solely on religious conversion. This change parallels societal shifts during the period where Progressive reformers and religious missionaries sought to improve lives through a combination of spreading Christianity, democracy, and modernization to areas around the world, mirroring views and actions described by figures like Reverend Josiah Strong and the American Board of Commissioners for Foreign Missions. This shift suggests an evolving perspective that more closely aligns with the option, they added humanitarian goals to the list of evangelism goals (option c).