What is crossroads a sad vaudeville about?

Cruce de vías was published in Spanish in 1959 (translated as Crossroads in 1993) and is subtitled "A Sad Vaudeville." Several years later, Solórzano turned from drama to fiction, publishing three novels including Las celdas (1971, title means "The Cells"). In 1974, his son, Diego, died in a hunting accident.

The answer is d. prior knowledge. she breaks it into parts in order to figure out what other words have the same parts to the word and put the meanings together.