The law of diminishing marginal utility refers to the phenomenon that consumers gradually reduce the evaluation of goods as the number of consumption increases during the continuous consumption of a certain product. According to the above definition, Which of the following are in line with the law of diminishing marginal utility (). ['Wang has bought 3 houses in succession, and the prices of the last two houses have gradually dropped.', 'Zhang ate 12 buns in a row, and when he ate the 13th bun, not only did he not feel hungry, but he felt sick.', 'A company issued a new batch of corporate bonds, causing the market yield of all bonds of the enterprise to decline.', 'Microwave ovens were expensive kitchen equipment in the 1990s, but now they are cheap and popular.']