The correct answer is B. Series of 1s and 0s.
Computers are extremely fast and have fantastic memories. However, the only thing they can remember is a series of 1s and 0s. This is because computers are digital devices, which means that they can only represent information in the form of discrete values. These values are typically represented by the numbers 0 and 1, which are often referred to as binary digits or bits.
A series of bits can be used to represent any type of information, including text, numbers, images, and sounds. This is done by encoding the information into a binary code. For example, the letter “A” can be represented by the binary code 01000001.
Computers can store and process information very quickly because they are able to perform calculations on binary numbers at very high speeds. This is why computers are so useful for tasks such as data processing, scientific computing, and artificial intelligence.
The other options are incorrect because they are not the only thing that computers can remember. For example, computers can also remember instructions, Boolean algebra, and logic theorems. However, these are all ultimately represented as a series of 1s and 0s inside the computer.