I want to know the answer to the following question:
What three speeds were sound on most home stereos in the mid 1950's?
All the background I'm provided with is that "The adapter could be a small solid circle that fit onto the bottom of the spindle (meaning only one 45 could be played at a time) or a larger adaptor that fit over the entire spindle, permitting a stack of 45s to be played.". Is that enough to answer the question?