Could somebody answer this Which of the following makes written communication effective?

Using slang

Using long and rambling sentences

Using complex and hard to understand sentences

Using correct spelling, grammar and tone

Aprice ceiling is “binding” if the price ceiling is set below the equilibrium price. suppose that the equilibrium price is $5. if a price ceiling is set at $6, this will not affect the market in any way since $5 remains a legally allowable price (since $5 < $6). a price ceiling of $6 is called a “non-binding” price ceiling. on the other hand, if the price ceiling is set at $4, the price ceiling is “binding” because the natural equilibrium price is $5 but that is no longer allowed. what happens when there is a binding price ceiling? at a price below the equilibrium price, quantity demanded exceeds quantity supplied. there is a shortage. normally, price increases eliminate shortages by increasing quantity supplied and decreasing quantity demanded. in this case, however, price increases are not allowed past the price ceiling. we therefore predict that the observed market price will be right at the price ceiling and there will be a permanent shortage. the observed quantity bought and sold will be dictated by the quantity supplied at the price ceiling. although consumers would like to buy more, there are no more units for sale

If the findings and the results are not presented properly, the research completed was a waste of time and money. true false

Oliver's company is planning the launch of their hybrid cars. the company has included "never-before-seen" product benefits in the hybrid cars. which type of advertising should oliver's company use for the new cars?