Which of these is a statistical question? I accidentally clicked an clicked an answer, but I want to know which one is the right one.

Step-by-step explanation:

I think A is the answer to your question

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.