Answer:
Key.
Explanation:
Trio Sonata is demonstrated as the musical genre that is composed of three parts where the first two are played by the high melody instruments like a violin while the third('a basso continuo') is composed through a cello.
Arcangelo Corelli is characterized as one of the most widely acknowledged and influential composers of the trio sonata. As per the question, the 'op. 3, no. 10' composed by Corelli comprises of 'four short movements' and all of them in the same key. This trio-sonata composed and published in 1689 by Corelli is dedicated to the duke of Modena and consists of twelve trio-sonatas.
