Please help with the second part of my homework please? What context clues helped you determine the meaning of the idiom “(to) put a positive spin on”?

A. “Chang-­bo’s job was to report business stories.”

B. “He had good reason to scoff at the report about the rubber boots.”

C. “Chang-­bo knew better than anyone that the supposed triumphs of the North Korean economy were fabrications.”

D. “By the time they were edited by his superiors in Pyongyang, however, any glimmer of the truth was gone.”

This book is called "Nothing To Envy".

here is a little bio that might help with the answer

hang-­bo’s job was to report business stories. He toured collective farms, shops, and factories with a notebook and tape recorder, interviewing the managers. Back in the newsroom, he would write his stories in fountain pen (there were no typewriters) about how well the economy was doing. He always put a positive spin on the facts, although he tried to keep them at least plausible. By the time they were edited by his superiors in Pyongyang, however, any glimmer of the truth was gone. Chang-­bo knew better than anyone that the supposed triumphs of the North Korean economy were fabrications. He had good reason to scoff at the report about the rubber boots.