give correct answer and explain it

In the Mortensen-Pissarides model with the matching function H(U, V) = A1/UV, the equilibrium unemployment rate 0 does not depend on the size of the labor force, L 0 an depend positively or negatively on the size of the labor force, L 0 depends negatively on the size of the laborforce, L 0 depends positively on the size of the labor force, L