Question

Which of these sets is the null set?
a. A = { x ǀ x is a letter before a in the alphabet.
b. B = { x ǀ x2 = 9 and 2x = 4}
c. C = { x ǀ x x}
d. D = { x x + 8 = 8 }

Answer 1

Answer:

A is answer I think

Step-by-step explanation:

please mark me as brainlist