philipyu1025

If you negate C, you will get  "Makers of cookware will  find Kitchen a less attractive advertising vehicle because the magazine's name is associated with a competing product " ; that is, makers of cookware who do not use the name of Kitchen magazine   are unwiilling to advertise their products  on Kitchen magazine  since this magazine is associated with their competitors resulting from licensing the use of its name for their competitors' products . In this way, although Kitchen magazine   can collect its licensing fee, it at same time will lose the adverting fees by way of losing opportunities  of leasing its advertising area by the aboved makers of cookware.

when you deal with "the necessary assumption" type of Sc, you should negate the option in order to get the right answer, no personsal feelings can be added into it. If you are not good at this type of SC, i sugggest you to take time to learn the post of (八) 逻辑入门 by Sdcar2010, trust me, you will learn a lot !