If a Company Wishing to Sell Baby Monitors (To Help

If a company wishing to sell baby monitors (to help with infants that have trouble breathing) wanted to estimate the size of their potential market in a developing
Country for which little data was available, they could get the population size, examine
The number of births per year, focus on cities that had the highest birthrates, and
Contact hospitals that had the most problems with SIDS (sudden infant death
Syndrome) . This logic most closely approximates which of the following methods
Listed below?

A) analogy method
B) Latin square
C) trade audit
D) chain ratio method
E) cross-sectional regression analysis