Which of the following statements about the cash management in multinational companies is correct?

a$.$ Multinational companies do not use lock box systems, because most countries do not permit such banking arrangements.

b$.$ Multinational companies often try to slow down collections and speed up disbursements where possible.

c$.$ Multinational companies always prefer holding more cash in their foreign operations than in their domestic operations.

d$.$ Most multinational companies face restrictions imposed by foreign governments when transferring funds from their foreign operations to their home countries.

e$.$ Most multinational companies prefer to operate in countries that enact quotas on imported goods, because such quotas normally limit the amount of money the firms can lose in those countries.