The marginal density function of \(x\) can be determined form the bivariate density function \(p(x, y)\) as

a. \(p(x)=\int_{-\infty}^{\infty} p(x, y) d y\)

b. \(p(x)=\int_{-\infty}^{\infty} p(x, y) d x\)

c. \(p(x)=\int_{-\infty}^{\infty} \int_{-\infty}^{\infty} p(x, y) d x d y\)