This shift in demand was likely the result of the improved technology of MP3 players.
Improved technology brought improved quality of MP3 players, which meant that more people were interested in buying them. MP3 players are far more convenient than CD players, because they are smaller, more easily portable, and overall better.
Answer: Secondary data
Explanation: In simple words, the data that is collected by someone and is used by someone else is called secondary data. Government reports and surveys by other such organisation are two of the many examples of secondary data.
In the given case, Sandra collected information for her future business from the published research reports. She did not collected data from a census conducted by herself.
Hence, from the above we can conclude that the correct option is B.
Answer: I found Optimum Internet advertisement effective.
Explanation: I found optimum internet effective because not only does it cost less but it's a good deal.
I really don't know if this is will help but that's what I find effective.
