True or false :
red grapes can make white wine.
the disease that killed 50-100 million people between 1918-1919 was the flu.
the motown recording label began in detroit.

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.

answer: the answer is d