Question

the primary purpose of the photograph \orphan train\ is to —
a describe the experiences of the homeless children on board
b show how the trains were designed to carry hundreds of children
c illustrate that many children were transported out of new york
d explain why homeless children were taken to different places

Explanation:

The "Orphan Train" photograph likely aims to show the transportation of many homeless/orphaned children out of New York (historical context of Orphan Train movement). Option A focuses on experiences (more narrative than photographic purpose), B on train design (not main purpose), D on explaining why (photograph can't explain reasons as text would, it illustrates action). So C fits as the primary purpose of the photograph is to illustrate the transportation of children out of New York.

Answer:

C. illustrate that many children were transported out of New York