Which two conditions have favored adoption of 802.11g over 802.11a? (Choose two.)

Which two conditions have favored adoption of 802.11g over 802.11a? (Choose two.)

• 802.11a suffers from a shorter range than 802.11g.
• The 2.4 GHz frequency band is not as crowded as the 5 GHz band.
• 802.11a is more susceptible to RF interference from common commercial items.
• 802.11a uses a more expensive modulation technique than 802.11g.
• 802.11g is backward compatible with 802.11b, but 802.11a is not.

Exam with this question: CCNA Exploration 3: ESwitching Chapter 7 Exam