Final answer:
The First World War had a significant impact on missionary efforts, including a decrease in missions giving and a shift in focus towards war relief efforts. However, the training of missionaries continued, leading to improvements in missionary methods.
Step-by-step explanation:
The First World War had a significant impact on missionary efforts in addition to hindering overseas travel.
b) Missions giving fell to an all-time minimum as the war led to a decrease in financial support for missionary work. The focus shifted towards war relief efforts and supporting soldiers instead.
d) The training of missionaries continued even though they could not be sent out. Missionary organizations used the time of war for reflection, thought, and training to improve missionary methods.
Overall, the war disrupted overseas missionary work but also led to some positive changes in missionary methods and focus.