Question 19 is based on the passage you have just heard.

    According to Charles Happer, Chairman of CanAgra, the Healthy Choice line of frozen dinners, began with his own heart attack. It’s been brought on by years of eating anything he could get his hands on. (19) As he’s lying in hospital, recovering, Happer imagined a line of healthy frozen foods, the Tasty Good. (20) The Healthy Choice product line was carefully tested with consumers before being introduced to the general public. CanAgra’s research and development staff spent a year working under the instruction—“Whatever the cost, don’t sacrifice taste”. The first test market results surprised even the CanAgra team: the low sodium low fat frozen dinners sold much better than expected. According to the firm’s vice president of marketing and sales, (21) we benefited from low expectations. The products were much better than people thought they would be. This finding supported CanAgra’s decision to position a product against other high quality frozen dinners, rather than as a diet or health food. The new product’s brand’s name and packaging were an important part of the development process. (22)The name Healthy Choice was chosen for the positive implication it held for consumers. Because CanAgra felt the product would be an impulse purchase, it was important to make the item stand out in a freezer case. This was accomplished through the dark green packaging that not only differed from the competitors, but also suggested freshness and richness in vitamins.

(19). What did Charles Happer think of while he was in hospital?

解析：原文中提到“健康之选”食品的想法来源就是因为该公司的董事长CH在医院住院时想象着一连串美味健康的冷冻食品，这使得CH开始生产这种冷冻食品，故答案选B。