Consider the following information on the stock portfolio of the Gainesville City Meter Maid Retirement Fund: Business Machines, Inc.: $400,000 investment Beta coefficient: 1.2 Gold Rush Mining: $600,000 investment Beta coefficient: 0.4 Humanity Healthcare: $1,000,000 investment Beta coefficient: 1.5 Home Supply Source: $2,000,000 investment Beta coefficient: 0.8 Total investment amount: $4,000,000 What is the beta coefficient of this portfolio?

a. 0.625

b. 0.730

c. 0.835

d. 0.940

e. 1.045