By adding recirculating lines to a 4-bit parallel-in, serial-out shift register, it becomes a ________, ________, and ________-out register.

series-parallel-in, series, parallel

bidirectional in, parallel, series

By adding recirculating lines to a 4-bit parallel-in, serial-out shift

1.	By adding recirculating lines to a 4-bit parallel-in, serial-out shift register, it becomes a ________, ________, and ________-out register.
A.	parallel-in, serial, parallel
B.	serial-in, parallel, serial
C.	series-parallel-in, series, parallel
D.	bidirectional in, parallel, series
Answer» B. serial-in, parallel, serial