Answer;
D. technological advances
Explanation;
The Edwardian era in the United Kingdom is the period which included the reign of King Edward VII (1901–1910). The Edwardian period has been named after King Edward VII who succeeded Queen Victoria in the year 1901.
Though quite short, the Edwardian era included a number of developments of critical importance for the interactions of science and technology. Prominent among the many advances in applied science were the conquest of malaria, the mastery of aviation, the beginnings of electronics and wireless telegraphy, and the production of synthetic fertilizers by chemical industry.
To ensure that the product is printed accurately, Leonard has to establish the measures and send them to the printing place. He has to be very clear and specific in the way and the measures he wants the layout to be printed when he attaches the file with the design. Of course there can always be a misunderstanding, but the most you clarify the details, the more possible it is to turn out just the way you imagined it.