Which of the following statements is not true?

A. A system of thron Inear equations in three variabiles can be geometically represented by three planes in space.
B. A system of three inear equations in three variables can hare ane urique solition.
C. A systam of three inear equatons in three variatles can hawe infrilely many solutions.
D. A system of thrne linegr equations in threo variables must hwe at least ane solution.