Which of the following statement(s) is/are correct?

Options

A. The system of constant entropy and constant volume will attain the equilibrium in a state of minimum energy.
B. The entropy of the universe is increasing.
C. The process would be spontaneous when `(Delta S ) _( U,V) lt 0, (Delta U ) _(S, V) gt 0`
D. The process would be spontaneous when `(Delta S) _(U,V) gt 0, (Delta U) _(S,V) lt 0`

Explanation

For spontaneous process in an isolated system `(Delta S ) _( U, V) gt 0.` For a reversible adiabatic process, `(Delta S) _( U, V) = 0.`