The ideal gas law is expressed in the equation PV = nRT, where P equals pressure, V equals volume, n equals the amount of substance, R is the universal gas constant, and T equals temperature. Under the International System of Units, P is measured in pascals, V is measured in cubic meters, n is measured in moles, and T is measured in Kelvin. If the pressure in pascals, volume in cubic meters, number of moles, and temperature in Kelvin were known of a sample of an ideal gas, then which of the following equations could be used to determine the value of R in JĀ·KĀ·mol^(-1), where J is energy in joules? ( ) A. R = PVn/T B. R = nTP/V C. R = PVn/T D. R = PV/nT