What Are Some of the Ways That Fixed Exchange Rates Can

What are some of the ways that fixed exchange rates can be advantageous in an economy?

A) Fixed exchange rates make foreign investment easier, solve the problem of "stickiness" in the price of goods and services, and make a financial crisis less likely.
B) Fixed exchange rates are the most accurate reflection of market realities, make foreign trade easier, and can help end a financial crisis.
C) Fixed exchange rates can make foreign trade easier, help end a financial crisis, or help establish a new central bank's credibility.
D) Fixed exchange rates reduce uncertainty for businesses, make a financial crisis less likely, and can help end a financial crisis if one occurs.