A standing wave is established in a 557-cm-long string fixed at both ends. The string vibrates in four segments when driven at 275 hz.

It's true it didin't work becouse britain continued trading with it's colonies and the system hurt economies of the countries that used it

“when two plates carrying continents collide, the continental crust buckles and rocks pile up, creating towering mountain ranges. when an ocean plate collides with another ocean plate or with a plate carrying continents, one plate will bend and slide under the other. this process is called subduction. “ i found this on google i hope it

Then the answer would be d then