Which of the following statements are correct in regard to solving quadratic equations that represent real-world situations? Select all that apply. (More than one could possibly be selected. a) If a solution is a negative real number, it will be feasible but not valid if it is a unit of time, length, area, etc.
b) Complex numbers are feasible solutions to real-world situations.
c) Complex numbers are not feasible solutions to real-world situations.
d) Solutions to quadratic equations must be real numbers to be feasible for real-world situations.