Which is correct for UART on the ATtiny$1626?$

Group of answer choices

For the USART$0$ peripheral, buffer mode must be enabled by the user.

Receive and transmit will always happen at the same time.

The receive complete $($RXC$)$ and data register empty $($DRE$)$ interrupt flags must be cleared by the programmer at the end of the interrupt service routine.

The receive complete $($RXC$)$ and data register empty $($DRE$)$ interrupt flags are automatically cleared by hardware based on reads$/$writes from$/$to the TX$/$RXDATA registers.