Final answer:
The correct statement about Corelli's Trio Sonata in C major is that it was composed in 1694 and was the first sonata in his fourth publication.
Step-by-step explanation:
The statement about Corelli's Trio Sonata in C major that is correct is option a: composed in 1694, it was the first sonata in his fourth publication. Arcangelo Corelli was an influential Italian violinist and composer of the Baroque era. His Trio Sonatas, which were published in several collections, are particularly noted for their form and style. The Trio Sonata in C major, Op. 4, No. 1, is not specifically linked to a church service (option b), nor are all of its movements in ritornello form (option c). This work is not a solo sonata (option d), but rather a trio sonata which typically involves two melody instruments and continuo. Lastly, there is no evidence that each movement represents the Christmas season (option e).