When used as a parameter, a ________ variable allows a function to access and modify the original argument passed to it.

Assuming the following is the beginning of the constructor definition for class BasePlus-CommissionEmployee which inherits from class Point,

BasePlusCommissionEmployee::BasePlusCommissionEmployee( string first, string last, string ssn, double sales, double rate, double salary ) : CommissionEmployee( first, last, ssn, sales, rate ) The second line: a. Invokes the CommissionEmployee constructor with arguments. b. Causes a compiler error. c. Is unnecessary because the CommissionEmployee constructor is called automatically. d. Indicates inheritance.

The Retinex theory states that colors are not determined in isolation.

a. true b. false