Final answer:
The two features that allow 802.11ac to achieve higher data throughput are MIMO and Beamforming, which enhance performance and signal quality respectively.
Step-by-step explanation:
The features that allow 802.11ac to achieve higher data throughput are MIMO (Multiple Input Multiple Output) and Beamforming. MIMO utilizes multiple transmitter and receiver antennas to improve communication performance, which leads to increased data rates and network capacity. Beamforming, on the other hand, improves signal quality and range by concentrating a wireless signal towards a specific receiving device, rather than spreading the signal in all directions. Channel bonding, another feature of 802.11ac, increases bandwidth by combining multiple channels, but it is not listed among the choices provided. Code division multiplexing is not a feature used in 802.11ac.