【单选题】

The newBrite-X 400L dishwasher soap is a product of years of research on the part of scientists working on theBrite-X team and is sure to make your dishwashing less stressful.Designed specifically for use with vintage cast-iron pots, nonstick pans, delicate ceramics, and other cookware that should not (147) in the dishwasher, 400L soap has the strength to get the job done in one go.

Simply fill your sink with hot water from the tap and mix in approximately two tablespoons ofBrite-X 400L dishwasher soap. The (148) amount may vary depending on the mineral content of your tap water, so experiment with different quantities to find what works best.
For everyday cleaning, no (149) is necessary. Simply wet the dish and wipe the surface quickly with a sponge. For more stubborn stains, leave the dish to sit in the soapy water for 10 minutes. Then, take it out, rinse it off, and it is sure to be as clean as new!
A．place
B．have placed
C．have been placing
D．be placed