Specify whether the ion below is aromatic, nonaromatic, or antiaromatic. If the ion is aromatic/antiaromatic, determine the value of n in Hückel's/Breslow's rule. If the ion is nonaromatic, explain your answer using the rules of aromaticity.

• A. The ion is aromatic, and n = 1. 
• B. The ion is aromatic, and n = 2. 
• C. The ion is antiaromatic, and n = 1. 
• D. The ion is antiaromatic, and n = 2. 
• E. The ion is nonaromatic because one of the carbons in the ring has no filled or unfilled p orbital.

Answer: (A)