The dress and the jacket is in the closet downstairs.
The compound subject "the dress and the jacket" needs a plural verb "are." If the "and" between the "dress and the jacket" were an "or" then the subject would be singular.
940 MCQ for effective preparation of the test of Subject Verb Agreement of English Grammar section.
Read the MCQ statement: The dress and the jacket is in the closet downstairs., keenly and apply the method you have learn through the video lessons for Subject Verb Agreement to give the answer. Record your answer and check its correct answer and video explanation for MCQ No. 187-4466.