下列化学反应中，同时存在离子键、极性键、非极性键的断裂与生成的是

A．2Na₂O₂＋2H₂O＝4NaOH＋O₂↑

B．Mg₃N₂＋6H₂O＝3Mg(OH)₂↓＋2NH₃↑

C．Cl₂＋H₂O＝HClO＋HCl

D．NH₄Cl＋NaOH＝NaCl＋NH₃↑＋H₂O

The value of a product is determined by the ratio of its quality to its price. The higher the value of a product, the better will be its competitive position. Therefore, either increasing the quality or lowering the price of a given product will increase the likelihood that consumer will select that product rather than a competing one.
Which of the following, if true, would most strengthen the conclusion drawn above

A．It is possible to increase both the quality and the price of a product without changing its competitive position.

B．For certain segments of the population of consumers, higher-priced brands of some product lines are preferred to the lower-priced brands.

C．Competing products often try to appeal to different segments of the population of consumers.

D．The competitive position of a product can be affected by such factors as advertising and brand loyalty.

E．(E) Consumers’ perceptions of the quality of a product are based on the actual quality of the product.