Which among the following statements is true about the wireless network without xG architecture?

• A. Existing wireless networks exhibit homogeneity in the spectrum policies and heterogeneity in the communication technologies
• B. Existing wireless networks exhibit heterogeneity in the spectrum policies and homogeneity in the communication technologies
• C. Existing wireless networks exhibit homogeneity in the spectrum policies and the communication technologies
• D. Existing wireless networks exhibit heterogeneity in the spectrum policies and the communication technologies