A program is processing a sequence of characters using a last-in, first-out data structure. The processing rule states that when an opening character [ is read from the sequence, it is added to the top of the data structure. Suppose the current state of the data structure is [ [ (with the rightmost character being at the top). If the very next character read from the sequence is [, what will be the new state of the data structure?

An algorithm processes a sequence of characters using a last-in, first-out data structure. The rule for an opening character [ is to add it to the top of the structure. If the data structure's current state is [ [ (with the rightmost character being the most recently added), and the next character from the sequence is [, the new state of the data structure will be ____.

A program uses a last-in, first-out data structure to process a sequence of characters. The rule is to add any opening character [ to the top of the structure. Arrange the following states of the data structure in the correct chronological order as the program processes the input sequence [[[.