A Firm's Planning Model Has Assets and Cash Proportional to Sales

A firm's planning model has assets and cash proportional to sales. The firm maintains a constant dividend payout ratio and a constant debt to equity ratio. Keying in on the asset to sales ratio, the firm's sustainable growth is _________ the ________ the asset to sales ratio.

A) higher; higher
B) higher; lower
C) lower; lower
D) constant; higher
E) constant; lower