please slove the following question

Companies that make products like razor blade cartridges, video games, and printer cartridges that must be used along with a main product are using optional- product pricing. Select one: O True O False In a print ad, the communicator has to decide on the headline, copy, illustration and colours called message format. Select one: O True O False Marketing communicators use appeals ranging from joy. love and humour to fear and guilt called rational appeal. Select one: O True O False Product line pricing takes into account the cost differences between products in the line, customer evaluation of their features, and competitors' prices. Select one: O True O False Costs that vary directly with the level of production are called variable costs. Select one: O True O False