A bit shift register operates synchronously, in that:

A) information is shifted one bit at a time within a word or words.
B) for every bit shifted in, one is shifted out.
C) the data entered must be shifted the length of the register before it is available to be shifted out.
D) all of these.

Bit Shift Register

A digital circuit used in computing for the temporary storage and movement (shifting) of bits to the left or right, often used in data manipulation and transmission.

Synchronously

Occurring at the same time or rate, synchronously refers to processes or events that are coordinated in time or operate in unison.