What technique that contrasts large areas of dark with smaller illuminated areas did Caravaggio master?

Although the early portraits of Constantine are fully in the tetrarchic mold, his later image represented the emperor as

A) ?the legally adopted son of Maxentius. B) ?a deity. C) ?eternally youthful. D) ?emotionally tense.

Who was the leading painter in the court of Spanish king Philip IV?

A) ?Monteverdi B) ?Goya C) ?Velázquez D) ?de Loma