________ float can be calculated by subtracting a firm's book balance from the firm's available balance

The constraints in a transportation model stipulate that:

a. The sum of units from all sources delivered to a destination is greater than or equal to the demand of the destination. b. The sum of units to all destinations originated from a source is less than or equal to the available units in that source. c. The sum of units delivered from a given source to a given destination is non-negative. d. All of the above.

The optimal dividend policy for a firm is always ________

A) to pay the maximum possible reasonable dividend B) different for different clienteles of shareholders C) to pay no dividend at all in a world in which both capital gains and dividends are taxed D) to pay the same-size dividend every year