Regarding wholesaling, which statement is true?

Multiple Choice

Good marketing managers select the type of wholesaler with the lowest cost when planning channels of distribution.

Merchant wholesalers have higher sales than agent wholesalers, but their costs $($as a percent of sales$)$ are over three times as high.

There are many more manufacturers' sales branches than merchant wholesalers.

Manufacturers' sales branches have higher costs than agent wholesalers and account for a smaller percentage of total sales.

Most retail firms do not require the use of wholesalers.