which of the following statements are true about the domain of an exponential function $f(x)=2\\cdot3^{x}$?\n…

which of the following statements are true about the domain of an exponential function $f(x)=2\\cdot3^{x}$?\no a. the domain is limited to positive real numbers only.\no b. the domain includes only integers.\no c. the domain is all real numbers except zero.\no d. the domain includes all real numbers.