Answer: B.
Explanation: The ocean currents produce waves that hit the continental plates and more them
Bartering, which has taken place since the early history of man, implies a process of exchanging of goods. Bartering may present some difficulties during the process of exchanging. One problem that may occur when one is bartering, appears as the result of two people having different ideas about the value of the item (Option "B"). Since bartering lacks a standard unit of account, the prices on goods could not be measures or quoted. Due to the absence of a common unit of account, disagreements between exchangers may difficult the bartering process.
A form<span> signed by a patient prior to a medical procedure to confirm that he or she agrees to the procedure and is aware of any risks that might be involved. The primary purpose of the </span>consent form<span> is to provide evidence that the patient gave</span>consent<span> to the procedure in question.</span>
D. It proposed an equal number of senators per state.
I had it as a study island question. hope this helps.
