(1)The data in the Excel spreadsheet linked below gives the average monthly price of gold (in dollars per ounce) for the years 1980 to 1983

In which of the years was the coefficient of variation of gold price the highest?

A 1980

B 1981

C 1982

D 1983

(2)In a regression analysis with multiple independent variables, what causes multicollinearity?

a. A strong linear relationship between two or more independent variables

b. A strong nonlinear relationship between the dependent variable and one or more independent variables

c. A strong heteroskedastic relationship between the dependent variable and one or more independent variables

d. None of the above