I want to know the answer to the following question:
Consumer sales of MCA films began in 1978 with what movie?
All the background I'm provided with is that "MCA owned the rights to the largest catalog of films in the world during this time, and they manufactured and distributed the DiscoVision releases of those films under the "MCA DiscoVision" software and manufacturing label; consumer sale of those titles began on December 15, 1978, with the aforementioned Jaws.". Is that enough to answer the question?
Answer: yes