directions: the question or incomplete statement below is followed by four suggested answers or completions. select the one that is best in each case. the grid below contains a robot represented as a triangle, initially facing up. the robot can move into a white or gray square but cannot move into a black region. the code segment below uses the procedure , which evaluates to if the robot is in the gray square and evaluates to otherwise. which of the following replacements for can be used to move the robot to the gray square?