Which of the following is true regarding forecast errors?

a$.$ Forecasts for the Chinese yuan are likely to have large forecast errors because the yuan is a volatile currency.

b$.$ Potential forecast errors may vary depending on the time horizon, the currency's volatility, and whether the country issuing the currency is experiencing political problems.

c$.$ Potential forecast errors may vary depending on the time horizon, the currency$$s volatility, and whether the country issuing the currency is experiencing political problems AND forecasts for currencies in high$-$inflation countries will be more accurate if they use the spot rate rather than the forward rate because the spot rate captures the difference in interest rates $($and thus inflation rates$)$ between two countries.

d$.$ Forecasts for currencies in high$-$inflation countries will be more accurate if they use the spot rate rather than the forward rate because the spot rate captures the difference in interest rates $($and thus inflation rates$)$ between two countries.