Answer:
These Cameras, as well as the skilled technicians, were in very less number, and a certain studio was able to develop only 8 technicolor films in one year to the maximum. Also, it required an enormous quantity of light, and the cinematographers need to be hired. And all this required a huge sum of money.
And hence the three reasons are: Very less number of films can be made in a year, an enormous amount of light was required, and it required the hiring of cinematographers.
Thus, these were the three main reasons.
Step-by-step explanation:
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