Is this right?

According to the two-sided search model, in equilibrium labour market tightness tends to be high when O A. the cost of a vacancy is high relative to the firm's share of the surplus. O B. the firm's share of the surplus is high relative to the cost of a vacancy. O C. profits are close to zero. O D. employment insurance benefits are high relative to the productivity of a match. O E. the firm's share of the surplus is increasing in market tightness