Bing Came to the U

Bing came to the U.S.on a swimming scholarship.After a few months of frustration with trying to find swim goggles like he used in his native country,he started a web site that offered specialty goggles for swimming,skiing,and snowboarding.Before launching the web site and filling orders,Bing spent a few months going to swim meets and gathering preferences about goggles from other swimmers.Bing's actions:

A) showed that he had a ready market for this product.
B) demonstrated that he had little experience with this product.
C) showed that he was promoting the web site before it launched.
D) demonstrated his need to better understand the market.